lauralehmann72

Equus Uneven Running Jerking

My 2006 Hyundai Equus with a gasoline engine runs unevenly. The check engine light is on, and there's a fault code. It also jerks when accelerating, and has 136075 km. Could this be the fuel pump or a vacuum leak?

A 2006 Hyundai Equus with a gasoline engine is experiencing uneven running and jerking during acceleration, accompanied by a check engine light and fault code. Possible causes suggested include a fuel pump issue or a vacuum leak. However, advice from another owner with similar symptoms points to an exhaust leak, particularly around the manifolds and catalytic converter, as a potential cause. After inspection, an exhaust leak was confirmed and repaired, resolving the issues.

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4 comment(s)

I had similar symptoms in my Equus. Check for exhaust leaks, especially around the manifolds and catalytic converter. A leak can cause misfires and rough running, triggering the check engine light. Have you checked your spark plugs and air filter recently?

Thanks. Were your symptoms identical, specifically the jerking under acceleration? Did a leak also trigger a similar fault code and check engine light?

Yes, all the symptoms were the same. The jerking was most noticeable at lower speeds. I'd strongly advise having a shop pressure test the exhaust system. It might save you from chasing fuel pump or misfire issues.

I appreciate the help. I had the exhaust system inspected, and a leak was found. The repair cost 265€, and it resolved all the issues. Thanks again for pointing me in the right direction.

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HYUNDAI

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EQUUS