Hyundai Genesis 3.8 Rough Idle

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

What are common reasons my Hyundai Genesis 3.8 has a rough idle?

While there are a variety of reasons your Hyundai Genesis 3.8 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 Hyundai Genesis 3.8 Problems

Find the most common driver-reported problems that are to blame when a Hyundai Genesis 3.8 has a rough idle.
A rough idle or hard starting condition may develop, most noticeable when the engine is cold, with fault code p161b s...
An idle fluctuation may be noted, the check engine light may or may not illuminate. replacing the throttle position s...
Hyundai Genesis 3.8 Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Hyundai Genesis 3.8 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