11 people reported this problem
Engine Control Module (ECM) can fail on Oldsmobile Cutlass Supreme
Viewing 1 - 3 of 3 problem details
Erratic engine idle. Stalling at idle and when slowing to stop or turn corners . Replaced ECM to correct.
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.
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