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'92 GTZ might need new ECM. Please help diagnose.

Posted: Sun Dec 21, 2014 11:20 pm
by jjaquu
I bought a Beretta recently but I have had some problems. Over heating was caused by the fan not turning on, so I routed it directly to the battery and it still works. I failed emissions and the check engine light is on constantly. I've been doing some research and most signs point to my ECM. Now, obviously, them's is expensive, so I wanted to know: Is it in fact my ECM? And if so: Can I perform other actions to reset or reprogram it before resorting to total replacement?

Thanks! -Jake

Re: '92 GTZ might need new ECM. Please help diagnose.

Posted: Mon Dec 22, 2014 2:27 pm
by ronaconda
Have you pulled the trouble codes from the ECM???

Re: '92 GTZ might need new ECM. Please help diagnose.

Posted: Mon Dec 22, 2014 9:33 pm
by woody90gtz
I have never had an ECM fail that would even run the car. I've had two dead ECMs, and both killed the engine instantly like turning off a swtich. Attempted restart would just crank the starter without a hint of refiring.

Re: '92 GTZ might need new ECM. Please help diagnose.

Posted: Mon Dec 22, 2014 10:13 pm
by Asylum
I agree with Woody in that it is very unlikely to be the ECM.

Hell re-wiring the fan could trigger an engine light. It often doesn't take much.

Check the codes with a paper clip and go from there.

Re: '92 GTZ might need new ECM. Please help diagnose.

Posted: Sat Jan 10, 2015 3:14 am
by Cliff8928
woody90gtz wrote:I have never had an ECM fail that would even run the car. I've had two dead ECMs, and both killed the engine instantly like turning off a swtich. Attempted restart would just crank the starter without a hint of refiring.
FWIW- My '7730 would cut out with any throttle input (idle was fine). I would reach over, tap on the ECM and it would be back to normal for a while. So they can fail and still run.