305 ECM vs 350

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May 31, 2010 | 10:12 AM

wammac

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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?

May 31, 2010 | 10:26 AM

RBob

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From: Chasing Electrons

Car: check

Engine: check

Transmission: check

Re: 305 ECM vs 350

Quote:

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.

May 31, 2010 | 11:12 AM

wammac

Thread Starter

Junior Member

Joined: Jan 2010

Posts: 46

Likes: 0

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?

May 31, 2010 | 12:49 PM

RBob

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iTrader: (1)

Joined: Mar 2002

Posts: 18,432

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From: Chasing Electrons

Car: check

Engine: check

Transmission: check

Re: 305 ECM vs 350

Quote:

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.