ECM upgrade (1227730) for stock 2.8 (Page 93/107)
Fierobsessed NOV 12, 03:44 AM
It never occurred to me till now, but check out the 16197427. With the $0D code. Iv'e been using it on my Van. It just clicked that since it was also used by the 4.3 V6, in both Stick and 4L60-E, Uses a distributor and vacuum EGR just like the Fiero. There is no compatibility issues with using it on a Fiero's 2.8. Its just a simple re-pin, and program. But even better, it also has a "TCC only" transmission option, so it can run a non electronic automatic just as well. This code is fully hacked and commented, and some people even have a version that runs MAF.

The ECM comes from practically all 94-95 GM trucks and Vans, and is identical to 16196395 and 161968625.

One thing to note, it is used to driving two TBI injectors. I don't believe it would have any trouble with 6 MPFI injectors.

Any thoughts on this?
Darth Fiero NOV 12, 01:20 PM

quote
Originally posted by Fierobsessed:

It never occurred to me till now, but check out the 16197427. With the $0D code. But even better, it also has a "TCC only" transmission option, so it can run a non electronic automatic just as well.



I'm not sure about this one. The $0D code and PCMs were always used with electronic auto transmissions (4L60-E and 4L80-E). I've never seen one used with a non-electronic auto trans nor a manual trans (those used different/older-type computers) in a factory application. So even though you found a "TCC only" option in the programming, it may not work due to the logic of the computer looking for more inputs from the trans (such as the gear pressure switches, temp sensor, and such). Of course it would need to be tried to see if it indeed does or does not work before we can say 100% one way or the other.

-ryan
Fierobsessed NOV 12, 04:07 PM
I frequent FSC (Full Size Chevy) Forum. These guys use this code for everything under the sun. The Electronic trans Vs "TCC only" transmission flag is well known to work fine on this code. I believe I have found a few trucks that appear to have a manual, and run this code, Specifically 4.3L 94-95 C10 Trucks with the MG5 Transmission. Strangely enough, The SBC's used an old C3 ECM in the same application with the same transmission.

But with $0E I can find quite a few, specifically ones P series trucks with big blocks, and a few 4.3's. $0E also uses the same computer. But is a bit less well known of a code, even though its only slightly different from $0D. It was specifically built to control the 4L80-E.

Because the connectors come out the bottom the ECM, It even fits in the factory computer holder for the V6 computers.
My favorite part is that it can control a modern 4L60-E, which means a 4T60-E isn't out of the question. And... I have had no problem putting this computer into diagnostic manual control, shifting the transmission via aldl cable, Potentially opening up the possibility of doing paddle shifters with a simple serial communication module.
Darth Fiero NOV 12, 04:58 PM

quote
Originally posted by Fierobsessed:

I frequent FSC (Full Size Chevy) Forum. These guys use this code for everything under the sun. The Electronic trans Vs "TCC only" transmission flag is well known to work fine on this code. I believe I have found a few trucks that appear to have a manual, and run this code, Specifically 4.3L 94-95 C10 Trucks with the MG5 Transmission. Strangely enough, The SBC's used an old C3 ECM in the same application with the same transmission.




That's cool. I wasn't sure if it would work or not because I never tried it and I've run into a couple of instances in the past where options/switches have been available in the programming to change and did not always work as advertised.


quote


But with $0E I can find quite a few, specifically ones P series trucks with big blocks, and a few 4.3's. $0E also uses the same computer. But is a bit less well known of a code, even though its only slightly different from $0D. It was specifically built to control the 4L80-E.

Because the connectors come out the bottom the ECM, It even fits in the factory computer holder for the V6 computers.
My favorite part is that it can control a modern 4L60-E, which means a 4T60-E isn't out of the question. And... I have had no problem putting this computer into diagnostic manual control, shifting the transmission via aldl cable, Potentially opening up the possibility of doing paddle shifters with a simple serial communication module.



If you want to try this PCM out, by all means, give it a shot. Let us know how it works. If nothing else, it could end up being another option.

-ryan
Fierobsessed NOV 12, 05:14 PM
My Fiero's are 3.4 DOHC and 3800 S2SC. So I can't try it... I'll see if I can find someone locally who is willing to experiment.

And, I too have played with codes that have switches that don't work as advertised. Mainly on my 94-95 3.4 DOHC's computer, flat out has a manual option. Yet, I still run an Automatic program with all sorts of code tripping stuff disabled in the code section. Works OK but not perfect yet. The manual code didn't really play too well. I might go back to it if I ever figure out why the car runs so poorly when its cold, just to see if it it's workable.
Englishrafe DEC 26, 05:40 PM
Hello from France, and merry Christmas and a happy new year.

Having just received my 7730 ECM through the post today (yes the French Post Office works on Boxing Day !), I am keen to get underway with the conversion.

My 7730 came out of an '88 Beretta 2.8.

My car is an '87 GT 2.8 L with 5-speed gearbox and with mild porting and polishing of intake and heads, free flowing exhaust - no cat etc...
I will probably go with a Truleo intake and headers soon as well and get rid of the EGR.

Will my MEMCAL need reprogramming?
What are your suggestions - oh and yes Ryan, would you ship back a MEMCAL to France?

Regards,
Rafe
Darth Fiero DEC 28, 01:30 PM

quote
Originally posted by Englishrafe:

Hello from France, and merry Christmas and a happy new year.

Having just received my 7730 ECM through the post today (yes the French Post Office works on Boxing Day !), I am keen to get underway with the conversion.

My 7730 came out of an '88 Beretta 2.8.

My car is an '87 GT 2.8 L with 5-speed gearbox and with mild porting and polishing of intake and heads, free flowing exhaust - no cat etc...
I will probably go with a Truleo intake and headers soon as well and get rid of the EGR.

Will my MEMCAL need reprogramming?
What are your suggestions - oh and yes Ryan, would you ship back a MEMCAL to France?

Regards,
Rafe



Yes, I ship internationally but there may be some restrictions (on insurance, etc). But we can discuss that when it comes time to make your order.

The mem-cal you have should be reprogrammed to work in the Fiero application. The 88 Beretta chip that is probably in your 7730 ECM is set up for an aluminum head 2.8 that had DIS. And I'm assuming you will be putting this on an iron-head engine with a distributor. So, at the very least, you would need the mem-cal reprogrammed to work with the engine (and transmission) you want to use it with.

I do have two options available for those of you needing mem-cals reprogrammed. You can either ship me your mem-cal to be reprogrammed (less expensive but you are without it longer), or you can get the moates G1 mem-cal adapter board and new chip (more expensive, but you don't need to send me anything to reprogram nor wait as long).

The moates G1 mem-cal adapter is a circuit board that plugs in between your computer and mem-cal. On the G1 is a socket that accepts an EPROM chip I can put the custom programming on to. This option does cost more due to the fact you will need to buy the G1 adapter and a blank chip but it may be worth it in your case since it would save you from having to ship me your stock mem-cal to have it reprogrammed. The other nice thing about having the G1 adapter is you can have me burn you new chips and just send those to you for you to swap out yourself instead of having to send something back to me in order to have it reprogrammed should you need changes made.

You can either purchase the moates G1 adapter yourself direct from www.moates.net or you can get it thru me. For pricing/options please contact me direct via email at: sp1@gmtuners.com

-ryan

[This message has been edited by Darth Fiero (edited 12-28-2009).]

Englishrafe DEC 29, 06:41 PM
OK, thanks for the info. I'll look into the adapter for the chip.

Yes, my engine is an iron head 2.8 with distributor.

I will contact you soon, thanks.
Rafe
Englishrafe FEB 07, 04:12 PM
OK
Just finished fitting my 7730 to the car this evening.
It started up 1st time, but ran with a bad (slow) idle and seemed to pollute alot.
I reset the base timing and then took the car for a run. (I set it to 10° - is this OK ? Should I go for more ? 11°, 12°, 13° etc... Remember: in France we have 95 and 98 octane fuel.)

It drove fine and seemed more responsive, however the car stalled each time I slowed to a stop at the junctions.
There appears to be a very slight throttle "lag" when you "blip" the throttle, but not really noticable when driving normaly.

Once home again, the car stalled while pulling in to my driveway. However I stepped a little on the throttle while riding the clutch and managed to park the car in my garage. At this time the car "coughed" once and then the idle was perfect !

I'll see tomorrow on the open road how it really drives. (I do 60 miles to work in the morning and another 60 in the evening to come home.)

I'll let you know how I get on.

Regards,
Rafe
Darth Fiero FEB 08, 12:16 AM

quote
Originally posted by Englishrafe:

OK
Just finished fitting my 7730 to the car this evening.
It started up 1st time, but ran with a bad (slow) idle and seemed to pollute alot.
I reset the base timing and then took the car for a run. (I set it to 10° - is this OK ? Should I go for more ? 11°, 12°, 13° etc... Remember: in France we have 95 and 98 octane fuel.)

It drove fine and seemed more responsive, however the car stalled each time I slowed to a stop at the junctions.
There appears to be a very slight throttle "lag" when you "blip" the throttle, but not really noticable when driving normaly.

Once home again, the car stalled while pulling in to my driveway. However I stepped a little on the throttle while riding the clutch and managed to park the car in my garage. At this time the car "coughed" once and then the idle was perfect !

I'll see tomorrow on the open road how it really drives. (I do 60 miles to work in the morning and another 60 in the evening to come home.)

I'll let you know how I get on.

Regards,
Rafe



Hey Rafe, base timing spec for this chip programming should be 10 deg BTDC. Make sure you are putting the ECM into base timing mode (by disconnecting the IC bypass tan/blk wire going between the ECM and ignition module). You can no longer put the ECM into base timing mode by shorting terminals A and B of the ALDL connector together, like the stock Fiero ECM calls for. If you are not disconnecting the IC bypass wire to put the system in base timing when you set your base timing advance, then you are probably running the base timing too far retarded which would cause the problems you spoke of.

Shoot me an email if you have any more questions or problems about this and I would be happy to help you out.

-ryan

[This message has been edited by Darth Fiero (edited 02-08-2010).]