94 3.4L Camaro PCM Internal Pics

[TurboProject]

Does anyone know these systems well enough to be able to identify the onboard chips?

I know the two flash chips on either board, adn they are commercial parts so they should be able to be removed and reflashed...or at least read. However I do not know what the other ones are. Obviously there are the 6 injector drivers up near the blue connector and they feed to that one chip...but I don't know what that chip is.

I'm wondering what the main processor is where the main program is stored for communicating with everything.

Thanks.

[TurboProject]

Pictures:

http://www.turbocamaroproject.com/megasquirt/GM16196397/IMG_2359.JPG

http://www.turbocamaroproject.com/megasquirt/GM16196397/IMG_2363.JPG

The fact that the one in the mid-left of the 1st board has a crystal going to it makes me think that's the main processor.

Do these operate by just having a main processor with all of the ROM external in those flash chips?

[bszopi]

http://www.geocities.com/MotorCity/Shop/9938/tuning/hacking.html

Scroll down to Phase 3, concerning the P6 and P66 PCMs. Find that chip and that is where your BIN is stored.

[ryeguy2006a]

On the above link it states in there that 94-95 ecu's are flash only. My question is the 93 ECM removable and/or compatible?

[IsaacHayes]

93 is removable but doesn't have DIS AFAIK, nor SFI. No support for 94/95 still. Only 94-95 flash based ECM I know that has been cracked is the LT1 ECM.

If you need to control a 3.4 you can use the older stuff and use a modified bin for the FWD aluminum motors (and possibly the ECM is needed too?) and run it on DIS that way but it will be MPFI (no biggie). Just remember the aluminum head code has less timing than iron head so you'd have to add that back in if you had iron head engine.

[ryeguy2006a]

What would be some of the interchange years on the fwd pcm? I have a 94 camaro 5 speed. I was thinking of using Ostrich thats why I was wondering about the removable PROM.

[IsaacHayes]

I forget the # its 1227730 or something. A LOT of cars had it. It controls DIS and is MPFI vs SFI, no real big deal there though. You should use the $A1 code on it and add in your spark/fuel/whatever to get back to the 3.4l specs. $A1 is 3.1mpfi code btw.

You might have to do some wiring changes. Others on here probably know more than I do about that. ForcedFirebird I think was going to do this conversion on a 94-95 might PM him and see what he has found out or he might be able to point you to others that know.

[ryeguy2006a]

Ok Thanks do you think that that would be really difficult? Because this is my daily driver and I don't wanna mess something up.

[IsaacHayes]

Well, you'd need diagrams for both and some time... You'd need a 2nd car for a while lol

[ryeguy2006a]

What is the difference between SFI and MPFI really? they are basically the same engine right?

[IsaacHayes]

Sequential vs MultiPort.

MPFI squirts fuel one bank(side) at a time. SFI fires the injectors individually for each cylinder and uses a cam sensor to determine when to fire.

You can run a SFI motor on MPFI no problem. You just won't hook up the cam sensor.

[ryeguy2006a]

I dont know maybe I'll just wait till they hack the computers on my car. haha

[IsaacHayes]

Eh... I've tried contacting the people who might have the tools or know how. They either didn't have time for such a thing or couldn't crack it.

[ForcedFirebird]

I forget the # its 1227730 or something. A LOT of cars had it. It controls DIS and is MPFI vs SFI, no real big deal there though. You should use the $A1 code on it and add in your spark/fuel/whatever to get back to the 3.4l specs. $A1 is 3.1mpfi code btw.

You might have to do some wiring changes. Others on here probably know more than I do about that. ForcedFirebird I think was going to do this conversion on a 94-95 might PM him and see what he has found out or he might be able to point you to others that know.

I'm still in delima. Haven't started that one yet, since the customer's car has the non-electric transmission OBD1 might be the easiest way. The '7730 is an internally mounted unit and the under-hood from the L-body '7727 is a better choice for the 4th gen F-body, but I personally haven't gotten that far yet. I'm sure you will hear all about it when it's going down