Mazda 626 Rough Idle

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

What are common reasons my Mazda 626 has a rough idle?

While there are a variety of reasons your Mazda 626 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 Mazda 626 Questions

See what others are asking about their Mazda 626. Get answers from RepairPal's community of auto experts and enthusiasts.
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Related Mazda 626 Problems

Find the most common driver-reported problems that are to blame when a Mazda 626 has a rough idle.
The intake manifold gasket can fail causing vacuum a leak and/or a rough idle condition. replacement of the leaking ...
Misfires under load (acceleration) can be caused by leaky spark plug boots. when a spark plug boot leaks, it allows t...
Mazda 626 Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Mazda 626 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