Mazda Miata MX-5 Rough Idle

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

What are common reasons my Mazda Miata MX-5 has a rough idle?

While there are a variety of reasons your Mazda Miata MX-5 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 Miata MX-5 Questions

See what others are asking about their Mazda Miata MX-5. Get answers from RepairPal's community of auto experts and enthusiasts.
30,000 miles rough idle at 750 rpm,once at idle,the rpm's start to drop causing a rough idel.tune up about 2,000 mi....
Engine emits black/grey smoke and runs rough will quit id idle is allowed to get below 1500 rpm

Related Mazda Miata MX-5 Problems

Find the most common driver-reported problems that are to blame when a Mazda Miata MX-5 has a rough idle.
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Mazda Miata MX-5 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