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305 ECM vs 350

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Old May 31, 2010 | 10:12 AM
  #1  
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Car: 1991 Firebird
Engine: 305 TBI
Axle/Gears: 2.73s
305 ECM vs 350

Would a 350 TBI use the same ECM as the 305 or is it different? Or is it just the PROM changed?
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Old May 31, 2010 | 10:26 AM
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: 305 ECM vs 350

Originally Posted by wammac
Would a 350 TBI use the same ECM as the 305 or is it different? Or is it just the PROM changed?
In general it is the same ECM. The PROM will be different.

RBob.
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Old May 31, 2010 | 11:12 AM
  #3  
wammac's Avatar
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Car: 1991 Firebird
Engine: 305 TBI
Axle/Gears: 2.73s
Re: 305 ECM vs 350

Ok well what are some of the other cars/trucks that have the same ECM because I think mine is fried. Do the trucks that have the L05 have the same ECM as the cars that do?
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Old May 31, 2010 | 12:49 PM
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: 305 ECM vs 350

Originally Posted by wammac
Ok well what are some of the other cars/trucks that have the same ECM because I think mine is fried. Do the trucks that have the L05 have the same ECM as the cars that do?
The only vehicles that I know of that use the '8746 ECM is the Firebird, Camaro, and Caprice. The Caprice being the only one that also had the L05 available.

Won't find the '8746 ECM in any trucks.

RBob.
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