1992 Corvette engine failure with error codes
Thread Starter
4th Gear
Joined: Aug 2013
Posts: 4
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1992 Corvette engine failure with error codes
My engine started to buck while driving with the speedometer reading 0. The engine now runs more smoothly, but check engine light is on with sys flashing intermittently. Any thoughts?
Thread Starter
4th Gear
Joined: Aug 2013
Posts: 4
Likes: 0
'92 Corvette with temporary engine failure
The car is running again with speedo functional.
The battery voltage reading is 14.2 v with the engine running.
The Obd 1 error codes are:
DTC: 51 Computer problem faulty or incorrectly installed PROM circuit or ECM/PCM failure
DTC: 63 EGR flow problem on board cruise control (My cruise control is inoperative) MAP or O2 sensor fault.
DTC: 64 EGR flow problem or cruise control.
DTC: 65 No def available.
DTC: 66 ECM computer circuit fault air conditioning pressure sensor fault (air conditioner is functional)
DTC: 67 AC pressure sensor or cruise control circuit switch
DTC: 71 AC evaporator temp sensor.
I don't know when the engine will cut out again. Thanks
The battery voltage reading is 14.2 v with the engine running.
The Obd 1 error codes are:
DTC: 51 Computer problem faulty or incorrectly installed PROM circuit or ECM/PCM failure
DTC: 63 EGR flow problem on board cruise control (My cruise control is inoperative) MAP or O2 sensor fault.
DTC: 64 EGR flow problem or cruise control.
DTC: 65 No def available.
DTC: 66 ECM computer circuit fault air conditioning pressure sensor fault (air conditioner is functional)
DTC: 67 AC pressure sensor or cruise control circuit switch
DTC: 71 AC evaporator temp sensor.
I don't know when the engine will cut out again. Thanks
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
The 51 would be the most likely cause of stall. I would check power and grounds terminals at ECM, along with chasis/engine ground terminals. Proms go bad very rarely. Poor connection could be cause and re-seating connections may correct. Spray contact cleaner on harness connectors can't hurt, don't spray module. Do not probe terminals that can lead to spreading terminals and poor/no contact with pin at ecm. If after that it still acts up I would replace ECM
