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Buick Regal Rough Idle

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

What are common reasons my Buick Regal has a rough idle?

While there are a variety of reasons your Buick Regal 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 Buick Regal Questions

See what others are asking about their Buick Regal. Get answers from RepairPal's community of auto experts and enthusiasts.
I replaced the thermostat and put engine back together. since then the car idles rough. i think i need to do a tune...

Related Buick Regal Problems

Find the most common driver-reported problems that are to blame when a Buick Regal 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 fuel pump may fail causing engine to stall and not restart.
Buick Regal Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Buick Regal 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
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