Cadillac Seville Rough Idle

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

What are common reasons my Cadillac Seville has a rough idle?

While there are a variety of reasons your Cadillac Seville 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 Cadillac Seville Questions

See what others are asking about their Cadillac Seville. Get answers from RepairPal's community of auto experts and enthusiasts.
My 90 seville seems to be idling rough and eating up gas. it doesnt do it all the time but more so then not. just re...
The "check engine" light comes on and sometimes goes off. lately it has been staying on. the diagnostic code comes ...

Related Cadillac Seville Problems

Find the most common driver-reported problems that are to blame when a Cadillac Seville has a rough idle.
The egr valve may stick open, causing a rough idle and/or the check engine light to illuminate.
The egr control solenoid or egr valve may fail causing the check engine light to illuminate.

Cadillac Seville 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