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Pontiac Montana Rough Idle

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

What are common reasons my Pontiac Montana has a rough idle?

While there are a variety of reasons your Pontiac Montana 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 Pontiac Montana Questions

See what others are asking about their Pontiac Montana. Get answers from RepairPal's community of auto experts and enthusiasts.
I had a blown head gasket and since I got my vehicle back it has been idling rough and just recently my check engine ...
when I start it up, all is fine. driving, all is fine. when I stop at a red light or stop sign, it idles a bit rough....
Pontiac Montana Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Pontiac Montana 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