GM rebuilt computer car has never run right since

[billy 420]

The owner had the cars computer rebuilt by gm (expensive ) to say the least . less than 4 years later all fingers point to a intermittent connection inside of the computer . the cars voltage reads 12+ volts right up to the pcm , but the scan tool reads 14 volts down to 7 volts at times . the car has a good battery and charging system . The O2 volts will not climb past .255 volts on the scanner but when you test the O2 wires voltage directly its up to .355 volts .Cars an 84 T_TYPE,blms are pinned at 150 and only creep down slowly to 130s when revving the engine ,despite my best efforts to seal exhaust and any intake , vaccuum leaks .The owner is obviously reluctant to replace an ALREADY REBUILT PCM with a newer unit so a great big THANK YOU to GM for nothing except a big bill . This PCM rebuild took place before i took the reigns , I had pinpointed the pcm months ago but had to rethink my diagnostics after i was told it had been rebuilt . Cars been down all summer now , all because we assumed the gm rebuilt pcm was good

 

[TexasT]

Swap a known good one in. This is when friends with cars (specifically friends with turbo regals) is mighty handy.

Posted from the TurboBuick.Com mobile app

 

[billy 420]

ya i wish i could , no-one around here though

 

[billy 420]

at this point im ready to swap the entire car for something that runs the same twice in a row

 

[TexasT]

Where is around here?

Posted from the TurboBuick.Com mobile app

 

[novaderrik]

an 87 ecm is $35 from every junkyard around here, and every place has a few on the shelf ready to go.
that and a $75 turbotweak chip will make the customer happy.

 

[billy 420]

round here ,ontario canada