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Cutlass Supreme

Hi Johnnie. Thanks for contacting us tonight. If your AC/Heater will not turn on (meaning the blower motor), then it's likely that you have a blown fuse or damaged electrical relay that powers the blower motor is likely the cause....

The blower motor only working on high speed is a common symptom of a failing blower motor resistor (https://www.yourmechanic.com/services/cooling-fan-resistor-replacement); but the fact the radio stopped working at the same time is unusual. It's possible that this could still be two...

The fuel pump and filter may be getting to the injectors but if the injectors are not opened then it would not start unless you sprayed starting fluid into the intake. The injector not opening means the crankshaft sensor is...

Hi Seantez. Thanks for contacting us tonight. In most cases, when you shift into reverse and the vehicle stalls, it's due to damage within the valve body of the transmission. If your Cutlass Supreme is fuel injected, clogged injectors or...

Hello. Most of the time this is caused by a failure in the key sensor located inside of the key lock cylinder. Either the sensor itself fails or the wiring from the sensor located in the steering column fails. Most...

Hi there. Check the camshaft (https://www.yourmechanic.com/services/camshaft-position-sensor-replacement) and crankshaft (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement) position sensors and make sure that they are plugged in. If the engine is cranking but not starting then the crankshaft position sensor could have failed. Also, check the mass air...

Hello - I suspect there is a bad ground or wiring damage on the left side wiring for the turn signals. The turn signals and emergency warning flashers use the same flasher unit (https://www.yourmechanic.com/services/hazard-turn-signal-flasher-replacement), which explains why the right side...

The clicking noise is an indication of either a bad or discharged battery or a bad connection in the starting circuit. There are two circuits in every starting system: the primary circuit that is energized by the key, and the...

You should have the suspension checked to make sure the noise is something that is not broken and is still safe to drive until you can get the part replaced. This way you are being safe.

This may be a question of a weak battery or potentially a failing starter relay. If there is a fast ticking sound when turning the key, it is likely that your problem may be a battery that is simply too...

You probably know this already, but I must mention that driving with the faulty power steering is very dangerous. This is definitely not an issue that can wait. The trouble could be in the power steering pump (https://www.yourmechanic.com/services/power-steering-pump-replacement), belt/tensioner (https://www.yourmechanic.com/services/drive-belt-tensioner-replacement),...

When you operated the car right after the tune-up, the coil somehow "found" a good enough path to ground for the ignition to function, but it was probably a high resistance path. That would have increased the load on the...

It would most likely be caused by a bad ignition key cylinder or ignition switch. If you could not turn key to off then the lock cylinder may be binding or the ignition switch is bad.

Hi There, The resistor is what controls the speed of the blower motor, not the relay. The blower motor relay (https://www.yourmechanic.com/services/blower-motor-relay-replacement) supplies power to this motor when you turn the switch to "on" that can sometimes fail. When this happens,...

Hello there, many common faults will cause your 1989 Oldsmobile Cutlass Supreme to have a hard time starting and die after it starts. You have done great in replacing the crankshaft position sensor, fuel pump, fuel filter, and ignition module...

If the catalytic converter (https://www.yourmechanic.com/services/catalytic-converter-replacement) is not working properly, it will cause the symptons you described, such as very poor fuel mileage, poor performance and a fuel smell as this is the raw fuel coming out of the exhaust. This...

Hello, thanks for writing in. If the check engine light is coming on and going off then usually it is not too serious. Most of the time this is caused by a sensor that is not reading quite right. The...

This is a common problem when the shift lock solenoid either isn't getting a signal or has failed, have a certified mechanic, like one from YourMechanic, inspect and diagnose the problem (https://www.yourmechanic.com/services/car-does-not-shift-from-park-to-drive-inspection).