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.
of the time it's
Vacuum Leak
of the time it's
Spark Plugs
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 ...
Engine runs rough at all speeds. no engine codes showing up. changed spark plugs and wires problem still there. eng...

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 can create several symptoms: Check engine light comes on Engine runs poorly or stall Increased emissions Reduced fuel economy Car won’t start I...Read More
When spark plugs fail, the engine will struggle. The check engine light will come on, and it may appear either solid or flashing. The driver would likely notice one or more of t...Read More