Question about Hyundai Motor 2002 Sonata

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Car idles hard when i stop at traffic lights or slow down.. i recently had the check engine light come on and the dealer changes the egr selenoid and valve.. but problem persist and is intermittent

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THE IAC VALVE (IDLE AIR CONTROL) MAYBE DIRTY OR STICKING,TRY CLEANING THE THROTTLE BODY WHERE IAC VALVE IS. IF THAT DOES NOT WORK REPLACE IAC VALVE.

Posted on Feb 02, 2010

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What causes engine to accelerate without gas?


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