Engine Control Module (ECM) can fail on Oldsmobile Cutlass Supreme

The Engine Control Module (ECM) can fail causing stalling, and engine and transmission drivability concerns.

RepairPal Verified
Average mileage: 94,445 (68,000–150,000)
5 model years affected: 1990, 1991, 1992, 1993, more1994
9 people reported this problem
3 people shared problem details
Erratic engine idle. Stalling at idle and when slowing to stop or turn corners . Replaced ECM to correct.
Problem; engine dies or sutters when driving at low speed, cooling fan comes on imeditly after starting car,speedometer does not regester,check engine light aluminated shifting erattic Diagnostic: check TPS resistance, check crank sensor, check ignition module for pluse, check speed sensor,clean MAF,check plugs and wires(600 ohm per foot ave), check temp sensorS and relayS. Solution: REPLACE ECM
Transmission just stopped shifting into 3rd gear. Now it shifts hard into 1st and 2nd. I have to have the car up to 55 until it shifts into 2nd. Engine tries to cut out when an increase of rpm's is applied.
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