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Reload this Page ecm flashing question

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Old 10-19-2009, 03:07 PM   #1
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Join Date: Aug 2005
Location: Crystal River, FL.
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Car: 91' Trans Am 1le
Engine: 350 TPI
Transmission: T5
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ecm flashing question
Hey guys, I have a 91' Trans Am that originally had a 305 tpi 5spd., however due to some unfortunate events I have to replace it with a 350 tpi 5spd. set up however i was still using the 305 ecm. Everything was going fine on it until it started to randomly shut off on me while driving about 4 months later and not starting back up till it was cooled down a bit. After checking everything possible I've come to the conclusion that i think the ecm it toast. I've been having some issues trying to find a ecm for this car cause it has speed density.

So heres my question I have found a ecm at the yard from a 88' GTA 350tpi, auto car. Is there any way that if I was flash this ecm that I can change it to read the speed density sensor instead of a maf sensor?
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Old 10-20-2009, 06:43 AM   #2
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Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
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Re: ecm flashing question
The 88' ECM has an external ESC module, the ESC is intergrated in the '91 ECM making it's memcal incompatibile with the '88 ECM.
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Old 10-20-2009, 11:20 AM   #3
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Join Date: Aug 2005
Location: Crystal River, FL.
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Car: 91' Trans Am 1le
Engine: 350 TPI
Transmission: T5
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Re: ecm flashing question
Quote:
Originally Posted by rgarcia63 View Post
The 88' ECM has an external ESC module, the ESC is intergrated in the '91 ECM making it's memcal incompatibile with the '88 ECM.
okay that you, I guess my search continues on for a ecm
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Old 10-20-2009, 11:29 AM   #4
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Re: ecm flashing question
Check all of your injectors to be sure none of them are less than 12 ohms.
Should be around 14-16 ohms each IIRC. Do a search to confirm the correct value for yours.
That will make it act as you describe and a new ECM will not fix it.
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Reload this Page ecm flashing question
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