1995 Oldsmobile Ciera SLOW AND SLUGGISH

95OLDS

MEMBER
1995 OLDSMOBILE CIERA

Computer problem
1995 Oldsmobile Ciera 6 cyl Front Wheel Drive Automatic 110K miles

After an annual required inspection was conducted at a local service station my car started to get sluggish accelerating and the engine light would come on. From a stop I would have to put the pedal to the floor and the car would slowly start off until it got up to speed. Even at speed the throttle is not very responsive. I checked the brakes (drums in the rear) to see if they were adjusted properly, checked all the fluids etc. I hooked up a diagnostic device to get a code from the computer and it read "Unable to contact" so I checked the fuses. Found two fuses blown a 10 and 20 amp fuse, one for the alternator and the other for a fan. When I replaced these the car ran fine again for about ten minutes. When I went to change the fuses again they were NOT blown. I checked the wiring harness for the alternator and had the alternator and battery tested, ALL OK. So it does not appear to be the brakes, transmission or the alternator/battery. Still can not talk to the vehicle with the diagnostic device. Could the poor performance and sluggish nature of the engine be caused by a bad ECU/ECM? Is this the culprit or does anyone have ideas on other areas I should focus my attention to resolve this issue?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it.