The new Megasquirt Plug N Play model [Archive] - Toyota MR2 Message Board

The new Megasquirt Plug N Play model [Archive] - Toyota MR2 Message Board Toyota MR2 Message Board > Toyota MR2 Generations > MK 2 MR2 - SW20 > MK2 Stand-Alone EMS and Nitrous Discussion > The new Megasquirt Plug N Play model PDA

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Jackstand Queen09-19-2010, 04:53 PMHere's a few opinions and observations about the New (began late 2009) Plug & Play Megasquirts at Diytune.com. I bought the DYI version, for financial reasons, as well as being able to adapt it to my significantly modified engine.

To begin with the kits are well labelled and organized. The parts and design show improvements over earlier Megasquirts.

Its very easy to assemble. However this is not an easy no brainer endeavor. The instructions to assemble the kit were ridiculously difficult to find. It took me hours to find the appropriate web page. The point of sale site, I think hides the instructions to keep from scaring off customers. Needless to say the kit did not arrive with instructions, or any programming.

I bought the 52 pin Nippondenso replacement version of the plug and play alledgedly made to work on the Supercharged MR2. There are no specfic directions anywhere that I could find on the internet to wire up the PnP MS for the 4agze. So, like, . . . I'm guessing at least dozens of other MS users . . . I will have to figure out where to place about 50 wires MYSELF. A lot of the wiring will be easy to figure out . . . there's a well identified output or input on the MS circuit board to connect to.

Megasquirt historically has had difficulty reading Toyota tach signals, and ignitor outputs. The latest version of MS II has the ability to make a 4agze run.

I've yet to work out all the details . . . . give me a couple of weeks. :rofl: Jackstand Queen09-23-2010, 03:15 PMWell the Megasquirt PnP is fleshing out pretty well now . . . its about 75% assembled.

The PnP version has its own (new & improved main integrated circuit board). So instructions and guidance on older MS boards will be useful for theorizing . . . but practically useless.

It looks like this is going to be a long term project.

Because I don't want to experiement with the unknowns. For example the IC regulator has 4 four wires or more going to it. And they are undifferentiated in the BGB pages I've looked up . . . and totally ignored on the DYIautotune pages.

As are most wiring issues having to do with the 4agze.

So I could try to jam it together as best I can . . . program it to my best guess . . . in a hurry . . .and get it hopelessly screwed up.

Or I could wire in what I'm certain about . . . . research the fuzzy areas . .. . get expert help . . . take my time . . and get better results.

I certainly hate the idea of just being experimental about it . . . and rewiring it over and over differently hoping to get it right. And possibly cooking the board during the experimental process.

I think . .. . overall . . . that I farged up buying the Megasquirt.

There is no support, or documents, or diagrams of acutally how to wire one up for the 4agze.

Its F.I.O.Y. (Figure it out yourself) really. donnyavery09-23-2010, 03:53 PMthanks for the info i was thinking about buying this kit you confirmed all the thinks i was worried about (and the lack of people locally that can tune it) if you can could you post so pics of your ms build it could help us out in the future and any assembly info Liger09-23-2010, 06:01 PMI used the Megasquirt DIYPNP Nippon Denso 76 pin kit on my Gen 2 MR2. The directions to the website that contain the assembly instructions should have been inside of the box of parts you received. Assembling the unit is honestly the simplest part of the entire process. Once you start trying to find the initial start-up values, you'll begin to pull your hair out.

My best advice for you is to email Matt Cramer of DIYPNP. They should have a lot of information about the MK1 MR2 setup since that is their shop vehicle. Matt helped me more than I care to admit and he is a very patient person.


Using the kit and expecting most everything to be figured out for you is missing the entire purpose of the kit. It is truly a "Do-It-Yourself" setup.

If you need any general help with it, feel free to PM me. Jackstand Queen09-23-2010, 06:24 PMO.M.G. Even Don Avery is smarter than I am!

At least he is smart enough to not even try guessing where about 50 wires go inside of a ECU!

Liger:

Matt is out of the office, and his standin wasn't much help. I agree assembling the components wasn't too hard. But there is zero guidance at DYIautotune.com as to wiring the 50 wires from the PnP board over to the harness connectors. Zip. Nada.

Like I said its not DYI, . . .. its F.I.O.Y.

At the rate I'm currently going, it will take a year to get it ready to actually run the car's engine. donnyavery09-23-2010, 06:36 PMO.M.G. Even Don Avery is smarter than I am!


hey that sounded mean are you implying that im dumb :lol:
and the

At least he is smart enough to not even try guessing where about 50 wires go inside of a ECU!
that is why i use a aw11 early sc ecu and harness with a piggy back in my ae86 and it worked so well im going to use it on the new nitrous build for it and it was easy Jackstand Queen09-23-2010, 06:38 PMDon, I was just joking around. I know you have a sense of humor.

And for the record . .. you are smarter than me . . . as demonstrated by your wise decision about MS PnP. donnyavery09-23-2010, 06:42 PMi dont, know you almost made me cry for a min here;) Jackstand Queen09-23-2010, 06:53 PMDon, . . .. come here you big lug . . .while I pretend to give you a fake hug, . . in order to slap you about the ears and top of your head.

Me so sorry. Really. donnyavery09-23-2010, 07:01 PMahah
any ways good luck and hope the ms works out mr2tim09-23-2010, 07:22 PMI've heard alot of owners claiming to use this Megaquirt system on this forum and am amazed that the MS organization discourages DYI folks like I am hearing of here.

Mr Liger? I think I too am missing "the entire purpose of the kit" since every "kit" I have ever used in the last 45 years of car ownership gave some idea about the parts and installation instructions. I'm a consumer, can solder, read technical and diagrammable schematics but am unfortunately NOT a Computer Systems major. Is that your point?

Lets deal with the reality of business and profit for a moment shall we? This firm makes much, much more money if THEY assemble this board for you. By witholding technical schematics, access to applicational information for DYI owners is MS possibly (un?) intending to discourage those of us "hands on" types.??

Liger's having to gravel to one single employee to obtain information which should be accessible after spending several hundreds of dollars for a product gives me the insight to stay away from this product like Mr Avery noted.

I applaud this information getting to the Mr2 owners! This forum is about sharing information and helping others avoid pitfalls and problems.

I too, see a problem here Don.

Tim (mr2tim)
ToyZ RacZing
A Toyota Race Team since 1986 Liger09-23-2010, 11:09 PMNo bit of information was withheld from me that wasn't available from their website and instructions.

I didn't have to "gravel" towards one single employee in order to finish this "kit". He was the main person that responded to all of my emails about MegaSquirt before I even bought the unit and as a result, our correspondence continued after purchase. I simply chose to keep emailing him with my questions because he was a very reliable resource. I had a lot of questions because prior to my assembly of this kit, I knew next to nothing about circuits, couldn't solder very well, and really had very little idea how in depth the ECS is. The questions I asked Matt were primarily beginner electronics questions that could have been answered through more reading online. The only really technical questions I asked Matt were those of trouble shooting. I had a few wires backwards and he told me some possible causes.

Where did you get the idea that they are withholding information?.....It seems that you feel that a "DIY kit" should be a do-it-yourself kit that should be straight forward, just like reading a manual, and be able to do it with little to no assistance. This is simply not the case and is why I mentioned earlier that you are missing the point of their product. They are providing a unit that has the ability to work with hundreds of different cars. They don't have the resources to find the pin-outs for every setup, nor do they have step-by-step manuals for every single application. They provide all the knowledge through their vast software and hardware manuals, great customer support, and a dedicated forum to assemble and give you a base starting point to moving in the right direction. It is silly to expect them to provide a step-by-step guide from opening the box to starting the car and driving away.

The do-it-yourself is in the assembly, all the leg work researching the pin-outs (which is not very difficult) and learning along the way. After getting my car running very well on their unit, I now know the ECS like the back of my hand and how every sensor ties in and all of the finite electrical parts to it. Do you need an Electrical Engineering degree to do this? Absolutely not. Do you need some general common sense, a firm grasp of how an engine runs and its ancillary systems? Yes.

I'd say too many people take the plunge with an ECS like MegaSquirt and then realize they are in way over their head. It is definitely designed for the more advanced gear heads out there. You need to be realistic about it. It is just like buying a full rebuild kit for an engine. You can do it yourself and save yourself a lot of money but you'll need to invest a lot of time and effort. The outcome is a direct result of this; if you hash it all together and don't take the time to really learn the in's and out's of the whole system, your rebuild will be very poor. Now if you really learn about engine building and be precise with your work, you can produce a rebuild that is just as good, if not better than a shop.

So what I have been trying to say is to not discourage new/potential MegaSquirt owners, but to make sure that they fully grasp what it is that they will have to do. It is a big challenge but if you stick with it, worth the pay-off. The factory ECS is complete garbage. Jackstand Queen09-24-2010, 12:12 AMI feel a sense of deja vu . . . when I was watching the South Park cartoon series where one of the adults in the show achieved the crowning glorious moment of his life.

He produced the worlds largest bowell movement.

I've spent hours and hours combing the web looking for answers.

There's nothing out there on the W. W. W.

I think the tech staff at DYIautotune.com will have to save my bacon if I'll ever get it installed.

Really, I'm about $600 poorer due to starting the project. And I don't feel its unreasonable to receive an assembly instructions in the box it came in. But there aren't any instructions for the 4agze version PnP anywhere on the net.

Liger . . do you have any idea how astronomically small the odds of jumpering those 50 wires in correctly . . . just randomly trying the possible combinations?

F.I.O.Y. Figure it out yourself 328FTW09-24-2010, 08:31 AMI'm interested in pics, was trying to follow but at 1:30am my mind is wandering and having trouble seeing the full story. Consider this subscribing to maybe pop some info in later. Liger09-24-2010, 08:40 AMGet the factory electrical wiring manual for your car and look at the factory ECU pin-outs. Then compare those to the pin-outs on the MS board and go from there. Jackstand Queen09-24-2010, 09:35 AMIts not the car's wiring that's the mystery here. I have a BGB and a printed out page of the harness plug ins labels found in Section 125 of the Fuel Injection chapter of the BGB.

What needs to be clarified is that the PnP has its own proprietary Integrated Circuit Board. Its made to run just about any car you can imagine. It has to be wired and accessorized differently to run different ignition and injection setups of the various car makers. So there can be no guessing as to how to wire it up. And only DYIautotune knows the entire circuit design of the PnP IC board. And this board has only been availalbe since late 2009.

Believe me . . .. the PnP board does not have corresponding labelled terminals or ports on the IC board that match the pin labels on the 4agze harness ends. This is a situation where you can logically assign some wiring connections from the IC board to the 4agze harness . . . but a sizeable percentage cannot be figured out inuitively.

For example, there are a lot of terminals on the IC board labelled B6, C2, P7, D5 and so on. Now those terminals do different things depending on whether other terminals on the board are connected together or not, and whether a component like a transistor is installed or not. On the board configured for the 4agze . . a number of components are not installed because they aren't needed. This is not something where inspired guessing is going to work.

Oh, wait maybe every Megasquirt customer is supposed have a master's degree in Electronic Engineering from Michigan Institute of Technology (M.I.T.). And figure it out himself!

Yeah, that's the ticket!

Here's a link to a guy who installed the PnP IC board for an early 80's Supra. Plenty of photos here:

My DIYPNP N52 Kit Write Up (http://www.celicasupra.com/forums/showthread.php?56054-My-DIYPNP-N52-Kit-Write-Up) Jackstand Queen09-26-2010, 12:49 AMI got the email address for diyautotune.com wrong, as Liger correctly points out. Liger09-26-2010, 11:32 AMI do believe the correct email address should be : websales@diyautotune.com

And why do you keep calling it DYI? It is DIY. mr2tim09-27-2010, 11:26 AMI agree that we disagree about this MS ECU board that is available for the consumer to assemble.

I understand your extensive communication with MS folks after the sale was to trouble shoot assembly mistakes that just maybe could have been avoided by proper instructions to begin with.(?) Perhaps I'm just "silly" in thinking a company I just paid $500 to would supply some sort of generic guide to the product? Good God man I could go to the freakin' local Radio Shack and get a box of electronic parts and a damn board for alot less than $500

Let get this straight, this company COULD provide generic installation guidelines but did NOT! (in this owner's case). Granted any owner should have the whereabouts to understand his car's ECU, it's pin setups and the parts interrelationship. But, even then, knowing this information it appears MS is failing to relate to the consumer how to install his information into the form required to relate that technology to the board's assembly.

I am trying to relate to other potential consumers considering this MS "assemble it yourself" EMS system purchase is that it appears this expenditure of $400-600 of equipment does not supply the consumer with ANY idea on how to apply your car's electronic equipment into this suppliers product.

I do however, agree with your statement that potential MS constructors on any level will have a "big challenge", perform a lot of "legwork", "have a lot of questions", keep "emailing MS employees" to have success with this product.

Perhaps in the end we are saying the same thing, that if you buy this product and expect anything but a multi-level hassle "your missing the point" of this product.

BTW>>>>>>>>>>>> DYI=Drive Yourself Insane Jackstand Queen10-01-2010, 08:53 AMI've been in contact with Tech Support from DIYautotune.com.

And I was correct that wiring up their new board for the 4agze has not yet been done.

Currently, I'm trying to figure out as many of the connections as I can, before turning over my work to their Tech Support.

And I have to admit . . . this is the hardest puzzle . . . I've ever tried to solve. toyotaspeed9010-01-2010, 03:18 PMI'm gonna throw out my two cents, for what it's worth... for as far as I know I was the first 4agze that retained the supercharger to be on MS... (there were several 4agte's at the time... this was in 2004, I think)

MS is a stand alone system.... period. Plug and play, in my opinion, doesn't apply and it's going to become just as difficult as not using plug and play... or you'll find that you still have a lot of work-around and/or excess wiring....

for instance... the AFM is a perfect example.... in the AW11/6 the IAT is built into the AFM.... ok, so you need an external AFM.... so now... do you make a custom harness of some sort to plug into the AFM wiring so that at the ECU you're still stock plug & play or do you hack the plug off and wire it directly?

There is a lot of wiring that toyota puts into these that either aren't on all vehicles or isn't necessary. I built my setup, made a short DB37 cable, and then hardwired the engine directly to the relay board (trust me, this makes it HEAPS easier).

guess I should also mention I'm not sure if the P&P setup will work with the gze's ignition setup... it was originally designed for the early AW11's which use a different ignition....

On mine, I use EDIS4.
keep in mind I'm on MS1 v2.2.... with 6x6 maps and an s19 file to match it's age...

This looks like a lot... but it really isn't:

http://i3.photobucket.com/albums/y82/toyotaspeed90/MR2/DSC_7798.jpg

the gauges are now long gone... I got them for free so I figured... why not:
http://i3.photobucket.com/albums/y82/toyotaspeed90/MR2/PIC00064.jpg toyotaspeed9010-01-2010, 04:09 PMI was at the very end of my break when I posted that.... I should have gone a little in depth...

I originalyl bought the mr2 with a known bad motor... got a gze witha cut harness on purpose. I took the stock harness and the gze pieces and basically stripped both down to nothing... on the n/a harness I kept the body type- electrical harness together... which includes for a couple sensors, the engine bay fan, the alternator, starter, etc... then basically took what I might have needed for the new engine... basically left myself with pigtails on each... then hand-wired the rest of the engine.

It gets VERY simple when you run these wires by hand.... trying to decipher the factory colors, dashes, lines, etc. can be difficult expecially when they've been contorted and crammed into 4 layers deep of tape/wrap, etc....

After I had run the engine electricals themselves I ran power, 12v switched, and a new fuel pump wire...

I retained the stock relay box... but realistically I could probably go through there and remove 3/4 of what's in there... just haven't seen or had a need to.... Jackstand Queen10-01-2010, 04:14 PMToyspeed 90!

I had been eagerly anticipating your "two cents". I knew that you had a lot of experience and ability with Megasquirts.

This latest version "the PnP series" has the potential to be a "no brainer", if there were specific instructions available.

The AFM removal issue is going to be handled by shorting out the wires that run the fuel pump at the AFM harness connector. And the IAT sensor will hook up to a 5 volt hot on one of the remaining AFM leads and the E2 ground wire too.

Apparently the MS 2.2 Extra version (which the PnP incorporates) can handle the yota VAST (hall effect) ignition with something they must have stolen from the Klingons.

I looked long and hard at the old MS system . . . and the optic wheel with the ford EDIS setup just scared me silly. I must say I admire that you had enough nerve to try it . . . and even more props for getting it to work.

There are two outputs off the PnP board I can run the SC clutch on. And still have one left over to run an IAC.

Since I wanted to be able to plug in an OEM ECU and stuff the AFM back in and run the car . . . I had to give up the sequential fuel injection option.

Once I get it all figured out and working.. . . I'll definitely share the web document I'm working on with the web.

Of course without a lot of help from the DIY technical assistance team . . . I could never get this thing off the ground.

Thanks for your Two Cents. toyotaspeed9010-05-2010, 04:25 PMI run batch fire and have zero problems with it at all.... this is how toyota had all of the 4age/4agze's wired.... so, works fine for me.

The edis4 system sounds difficult.... but it actually, in MY opinion, makes things easier.

The afm remark I made, coupled with yours, is exactly what I'm talking about. So it's a 'no brainer' to plug the ecu in... but then there are other issues you have to get it to work.

JamesL actually figured out how to get the Vast to work... and this was WAY back... I think even when I was trying to first figure out megasquirt. but be careful as not all aw11's are on the VAST system.

Now... back to the 'no brainer' topic. Deciding to use megasquirt is probably the biggest no-brainder I can think of in terms of this topic.... but don't be fooled because ANY aftermarket computer is going to have it's limitations and difficulties (currently a friend is trying to get his Hydra going on his Legacy.... let me tell you, I much prefer MS to Hydra... Hydra may have more options and higher resolution... but it's a pain to work with and isn't nearly as cut and dry as MS.... further, if you try to use someone's old Hydra and they've put a password on it... good luck).

Anyways.... so... plugging the computer in is about as simple as it can get... yes.. but tuning isn't that simple.... and later having the possibility of trying to figure out "what went wrong" can be quite difficult whether it's MS related or not.... so, I partially recommend NOT getting a PnP for the pure sense that when you wire the car up you understand what each component does and understand your wiring. You'll be amazed at what you learn when you rip a harness apart.

So, for the AFM plug.... do you find an old AFM you can cut up to get the male end of it and wire from it? If you hack up your own AFM to do this then you end up with a system that you can't simply swap back to stock. Also... there is an advantage to this... but only if you either carry ALL of the stock components with you everywhere you go... or if you just happen to break down at home (and how often are we that lucky). So you decide to just jumper it and then wire into it.... so, do you jumper off of the wires leaving previously weather-resistant wiring now exposed or do you just jumper right off the end of the plug.... then you gotta ask yourself if it's gonna stay put and how you'll keep junk from getting into the rest of the plug...

Again... this is all my take on the PnP version.... it's very alluring but possibly dangerous leaving you (this is in general, not specific to anyone) vulnerable if something goes wrong and possibly just as much thought/time has to go into using the PnP version as it would to just wire the whole thing.

Yes, I think the ability to go from MS to stock is a cool option... but I'm not gonna carry an AFM, coil/ignitor, etc with me everywhere.... the last MR2 I sold I originally put on MS... but because the harnesses in these cars are SO easy to get out it took me about an hour to swap back to stock, 100%, including swapping the crank pulley (remember, I use EDIS).... so realistically in an MR2 I still don't see the reasoning. Jackstand Queen10-05-2010, 09:31 PMI think I get the overall cautionary tone from Toyspeed 90.

And of course he is correct . . . there are pitfalls aplenty choosing to install a PnP.

I've thought about carrying around an ECU and AFM "just in case" in the front trunk. There's room for them there beside the car's battery, water alcohol injection pump and fluid resavoir for that system. The wiring mods I plan to make on the AFM harness connector are plug in style, and will be taped over to keep out debri and moisture.

Harnesses get old, stock ECU's by the evolutionary standard of computing technology are lodged somewhere in the Cretaceous, or dinosaur era. I am frankly amazed at how reliable stock ECU's are. I look around for 20 year old cash registers, calculators, game consoles, and PC's . . they aren't holding up as well.

But I agree with Toyspeed 90 in that I crossed the line of good judgement when I put the phrase "no brainer" in the same sentence with "Megasquirt PnP".

But if you have the problem of "no life", lots of time on your hands, and needing a technical challenge . . . then yes . . I recommend taking taking on all the risks of a possible "Epic Fail".

Well said 90. q-authority10-05-2010, 10:42 PMWithout distracting too much from the main discussion, could you clarify whether or not the AFM wiring must actually be hacked to some degree, in order to use the MS PnP system, if one is using standard AW11 4agze electronics?

I had not heard of that being necessary before, and having to do so certainly would be something that would make me think twice about choosing to use one of these, which had definitely been on my mind. I had heard it was supposed to be as simple as unplugging the MS PnP, and inserting the oem ecu once again, in case of emergency. Jackstand Queen10-05-2010, 11:04 PMQauthority:

You don't have to hack the oem harness up at all. I plan to replace the AFM with a piece of straight plastic to reduce airflow restriction. Though I could leave the AFM in place, but that makes no sense from the "you can never have too much horsepower" persepctive.

Low mileage 4agze harnesses aren't too common these days. I couldn't bring myself to hack up the one I found and intalled that had 107k miles on it when I swapped it in.

The bottom line is I expect to get around 20 HP from going with the PnP.

Anyone poised on the edge of making the leap of faith ought to wait until I get mine in, running and tuned pretty good. q-authority10-06-2010, 12:21 AMJackstand Queen:

Maybe I misunderstood, but it sounded like both you and toyotaspeed90 were talking about having to alter the AFM wiring. Was that because you are altering other items, or have I missed something? 328FTW10-06-2010, 12:43 AMJackstand Queen:

Maybe I misunderstood, but it sounded like both you and toyotaspeed90 were talking about having to alter the AFM wiring. Was that because you are altering other items, or have I missed something?

Cause the megasquirt has an internal MAP sensor therefore no afm required. You just run a vacuum line to the megasquirt from the manifold, at least I know mine is built in. q-authority10-06-2010, 12:55 AMYes, I'm aware that they have a MAP capability, but I would still like to know if some alternate wiring must be incorporated when using just the AFM. Jackstand Queen10-06-2010, 09:39 AMTake a jumper wire with female terminals. . . . short out two connectors on the harness connector. This lets MS run the fuel pump. Then using female terminals plug in the Intake Air Temperature sensor onto two different terminals of the harness connector. Seal the AFM harness connector with tape and secure with a tie wrap to keep it from rattling.

I have never posted a picture on this board, so I will post my writeup somewhere on the net and leave the link here. I am not going to post a step by step directions here and post pictures here. toyotaspeed9010-06-2010, 11:22 AMWhat we are talking about is actually 2 small pieces...

the AFM serves for 3 applications in the stock ecu, and the AFM has no use to Megasquirt.

1) it reads how much air is "coming in" based on how far open the flapper door is open. In megasquirt this 'type' or reading is done on an on-board Map sensor (which is why 328 said to run a vacuum line from the manifold to the ecu).

2) the AFM contains the air intake temp (AIT) sensor... of which most cars have it in the intake plumbing or the intake manifold. Megasquirt needs a proper AIT... so you can keep the AFM there, in all of it's useless-ness to act as a giant restrictiong AIT... or you can install one externally.... at which point you have a road to cross on how you want to wire it.

3) the fuel pump is primed and then will stay on as long as the AFM flapper door is open. MS will turn the pump on and off on it's own based on ignition readings.... so... the fuel pump is wired into the AFM... so again... cross the road of jumpering/cutting/etc...

so my point here is that you can either keep the AFM in place which is 100% pointless.... or you can figure out some way to remove the AFM (carry it around with you if you think you need to go back to stock) and bypass the plug/wiring... be it by cutting it or some how jumpering it but still managing to keep it clean enough to be usable if need be later down the road. q-authority10-06-2010, 11:36 AMThanks for the responses. Yes, I was somewhat aware that the afm had those system responsibilities (I just don't always have it ready for instant recall though, :D), but I had thought that the MS p'np was supposed to able to work directly with the afm, and only use a map as an option. If what you are saying is correct, then that would definitely remove it, or any other such demanding system, from my list of options. I'd love to have some extra control over the fuel map & igniton, after all my possible mods, but I also want to keep everything as stock as possible. You can't really call the new MS p'np if it requires that much substitution. Big Thurs10-06-2010, 02:07 PMI looked long and hard at the old MS system . . . and the optic wheel with the ford EDIS setup just scared me silly
What optical trigger do you speak of? EDIS uses VR.


Apparently the MS 2.2 Extra version (which the PnP incorporates) can handle the yota VAST (hall effect) ignition with something they must have stolen from the Klingons.
VAST is also a VR triggered ignition, it just has a buffer in the igniter to make the make the vr signal a nice square wave and thus uses the hall input circuit in ms.

IMO, the whole PnP is mainly a marketing scheme. Taking on a regular diy megasquirt (the old way :D) is a whole lot cheaper and easier because with the construction of a diybob and semi-pnp kits comes the need to investigate the ecu pinouts, functions, and wiring to the same degree as starting with just a regular ms kit. 328FTW10-06-2010, 07:36 PMMegasquirt is serious business lol. The EDIS setup is very simple, at its most simple you can set it up so it doesn't even need the MS unit it just locks to 10 degrees as a fail safe.

If I was going to make a "plug and play" I'd just hack an old ecu apart and wire my inputs/outputs to that minus afm of course. Then you just run a MAP line to it and done. Wiring it is easy imo, tuning the motor is a whole nother thing, just wish I had a steady state dyno in the shed :D Jackstand Queen11-28-2010, 06:25 PMMy MS PnP Update:


I had a lot of difficulty getting the Inegrated Circuit board up and running. I placed the soldering iron against a diode and fried it. Some of the terminals I soldered were shorted out by excess solder, and several didn't have enough solder.

I need to point out that the terminals you are expected to solder are 1/20", or half of a tenth of an inch apart. And they are so close together because the board is designed to fit in a roughly the same space as an original ECU (generic). The board assembly really requires a set of unusual skills and ability. Very fine hand-eye coordination, good vision, patience, and concentration.

However, I finally got the board to boot up with its firmware. With a lot of assistance from Matt Cramer of DIY.

While this was going on, I had a ongoing problem with a clunk in my steering, followed by an epic fail of my speedometer. I've been installing an aftermarket electric speedometer . . which is not as technically challenging as a Megasquirt . . . but still a piece of work.

About a month ago, I sent off a 12 page set of instructions for wiring the board up to the 52 pin connector boxes that the harness plugs into. I told DIY to take their time in editing and proofreading the document.

Well that's where the project stands . . . its moving forward slowly but surely. Jackstand Queen02-12-2011, 12:58 AMDIY autotune threw the towell in. They needed a car to work on at their shop in Georgia, and I'm 3000 miles away from that shop.:rolleyes:

It seems that a few 4agze DIY PnP's have come up for sale on the for sale sections of the MR2 boards. I wonder why the owners are dumping them. I really don't know the answer to that question.:omg:

I ended up sending off my DIY kit to a friend in another state who is a Megasquirt whiz, and who has other friends who are also Meqasquirt gurus. In short I sent it off to a Brain Trust. I'll either have to pay them for figuring it out, or end up selling the kit to them at a substantial loss (to encourage them to buy it).:(

Mega Squirts in general are not for every backyard mechanic by a long shot. And the PnP version is no exception to this rule. :(

However in the near future, a definitive wiring guide might be available, and a base tuning file also. So the PnP for the 4agze is still worth keeping an eye on. As a possible option to use in the future. :confused: 328FTW02-12-2011, 04:02 AMMega Squirts in general are not for every backyard mechanic by a long shot. And the PnP version is no exception to this rule. :(

I've literally been driving mine hard all day and only problem I have is I can't build boost which seems like a split pipe of something so I'll have to look but that was only on the last haul and I heard a weird noise, it's not the MS. Powered by vBulletin® Version 4.2.5 Copyright © 2026 vBulletin Solutions Inc. All rights reserved.