ECM upgrade (1227730) for stock 2.8 (Page 99/107)
lou_dias MAY 23, 01:42 PM

quote
Originally posted by fieroluke:

Now that the season is starting again, I have to work out a few wrinkles:

1.) Every so often, I get the SES light, usually when decelerating. Of course there is never a Scantool at hand when that happens, but I suspect it's a Code 32. I'll check if I have a restricted gasket, and I also got a replacement EGR valve.

2.) Highway only mileage at around 80-100 mph is a lot better than before the upgrade (may have to do with 95/98 octane gas here and the knock sensor), but my regular daily driving cycle has about 15% worse mileage than before. I didn't feel the DFCO kick in, is that disabled in the PROM?

3.) Sometimes I get a hard start, and exhaust smells like gas, so it's running too rich. Other times it's fine though...


You should still be able to jump the A & B pins on the ALDL connector to read the codes like normal.
chetw77cruiser JUN 07, 08:29 PM
For those who are interested, I have a few bin files of the $88 code mask that are set for both DIS and distributor ignition control. The other thing about the 7730 swap is that there is a way to retain the stock Fiero EGR system and not have to get an adapter for the digital EGR control. Most of the GM code masks have the ability to control the electronic vacuum regulated valve (EVRV) even though GM has gone towards the digital egr for better control and durability.

Another note, I have a tunerpro adx (data-stream definition) for the $88 code mask that has been changed to display the input from a WB02 sensor. A signal of 0-5 volts fed into F14 is displayed in the data-stream. This is of some use when dataloging and using that information to tune later on. Keep in mind I do not have a vehicle with the 7730 in it so I can not test this mod at the moment. If anyone is using the $88 code mask and would like to try this, let me know and I will send you a copy of the ADX file.

Keep tuning my friends,

Chet W.
lou_dias JUN 08, 10:32 AM

quote
Originally posted by chetw77cruiser:

For those who are interested, I have a few bin files of the $88 code mask that are set for both DIS and distributor ignition control. The other thing about the 7730 swap is that there is a way to retain the stock Fiero EGR system and not have to get an adapter for the digital EGR control. Most of the GM code masks have the ability to control the electronic vacuum regulated valve (EVRV) even though GM has gone towards the digital egr for better control and durability.

Another note, I have a tunerpro adx (data-stream definition) for the $88 code mask that has been changed to display the input from a WB02 sensor. A signal of 0-5 volts fed into F14 is displayed in the data-stream. This is of some use when dataloging and using that information to tune later on. Keep in mind I do not have a vehicle with the 7730 in it so I can not test this mod at the moment. If anyone is using the $88 code mask and would like to try this, let me know and I will send you a copy of the ADX file.

Keep tuning my friends,

Chet W.


I'm running an $A1 mask for my 3400 block w/Fiero heads and DIS. What's the difference between that and the $88 modified for DIS?

Thanks,
Lou
chetw77cruiser JUN 08, 11:11 AM

quote
Originally posted by lou_dias:

I'm running an $A1 mask for my 3400 block w/Fiero heads and DIS. What's the difference between that and the $88 modified for DIS?

Thanks,
Lou



Surprisingly, not much at all. The $88 code mask may have even been as the basis for the $A1 code mask. I have even used the $A1 code on a distributor application when I started tuning in 98. Used on a 1977 Toyota Landcruiser with TBI. The ADX for the $A1 can also be modified to display the wideband input over the A/C pressure sensor input. That is unless it is in use. The $A1 is also capable of controlling the EVRV egr system as well. Some tuning may be required though.

Side note, has anyone been using either code with the highway fueling mode enabled? Has it made a notable difference? I have used it in other applications and it helped, wondering what others have been able to accomplish.

[This message has been edited by chetw77cruiser (edited 06-08-2012).]

lou_dias JUN 08, 08:46 PM

quote
Originally posted by chetw77cruiser:
Surprisingly, not much at all. The $88 code mask may have even been as the basis for the $A1 code mask. I have even used the $A1 code on a distributor application when I started tuning in 98. Used on a 1977 Toyota Landcruiser with TBI. The ADX for the $A1 can also be modified to display the wideband input over the A/C pressure sensor input. That is unless it is in use. The $A1 is also capable of controlling the EVRV egr system as well. Some tuning may be required though.

Side note, has anyone been using either code with the highway fueling mode enabled? Has it made a notable difference? I have used it in other applications and it helped, wondering what others have been able to accomplish.


I intend to get the A/C working eventually.
What does it take to enable it? Also, what are some performance settings that you could recommend me changing? I'm running 19# injectors and I think I flood my motor at times at idle...well, I occassionally hiccup...
fieroluke AUG 23, 07:32 AM

quote
Originally posted by lou_dias:

You should still be able to jump the A & B pins on the ALDL connector to read the codes like normal.



True, but if I do this with the engine running, the light just indicates rich/lean, no trouble codes. I get trouble codes after cycling the ignition off-on, but that also clears the code :-(

So, no other way than to fire up the scantool with my laptop...
Fierokid87 APR 16, 07:56 PM
Sorry to bring back an old thread, was there a kit or anything for this ECU swap? I dont have a whole lot of experiene in re-wiring and i dont feel comfortable doing this. If there were someone local I would ask them but there is no one local to help me out. Id like to have my Fiero running good this summer.

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hiwil88formula APR 18, 03:07 PM
Get with phonedawgs, he does complete wiring harness's. I got mine from him and it works great. Look for his thread in the mall section.
Fierokid87 APR 23, 05:24 PM
Yeah i cant be without my engine harness. I want to drive the car this year, not let it sit even more which it has now for the last 6 years. One other thing I was wondering too because mine is a 5 speed would I need to find one from a manual trans car?

[This message has been edited by Fierokid87 (edited 04-25-2013).]

hiwil88formula APR 29, 09:35 PM
Well if I can get my core shipped out this weekend phone dawgs will have another core to work with. And mine is a 5spd harness.