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Oldsmobile Cutlass Supreme Rough Idle

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my Oldsmobile Cutlass Supreme has a rough idle?

While there are a variety of reasons your Oldsmobile Cutlass Supreme has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
34%
of the time it's
Vacuum Leak
21%
of the time it's
Spark Plugs
15%
of the time it's
Ignition Coil

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Related Oldsmobile Cutlass Supreme Questions

See what others are asking about their Oldsmobile Cutlass Supreme. Get answers from RepairPal's community of auto experts and enthusiasts.
Car just started running rough, run good for about 15 miles stopped at a light started idling rough then on take off ...
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Related Oldsmobile Cutlass Supreme Problems

Find the most common driver-reported problems that are to blame when a Oldsmobile Cutlass Supreme has a rough idle.
The upper intake manifold gasket and/or a pcv vacuum lines/hoses can develop vacuum leaks with age. this type of leak...
The intake manifold gasket may develop and external engine oil or coolant leak. in some cases, an internal coolant le...

Oldsmobile Cutlass Supreme Rough Idle Repair Symptoms

A failing ignition coil will create misfires in the engine, and lead to hesitation, extreme power loss, engine stalling, poor fuel mileage, and illumination of the check engine ...Read More
As we discussed, spark plugs are necessary for any gasoline engine to run. When they fail, the engine is in a constant state of attempting to ignite air and fuel, but cannot. Th...Read More