1999 Mazda High Idle Engine Light and Runs Rough

1999 MAZDA 626. 4CYL.
Question: MY CAR JUMPS AND PUTTS WHEN I STOP AND DRIVE. MY IDLE IS VERY HIGH AND MY CHECK ENGINE LIGHT RECENTLY CAME ON AND STAYED. WHAT COULD BE MY PROBLEM.

Answer: There are many reasons that can cause this problem. First step is to get a computer scan of the codes set since the check engine light is on. That may give an indication as what system is having the problem. Aside from that, just guessing, could be carbon buildup in the throttle, faulty Idle Air Control (IAC), vacuum leak, or one of any number of sensors has gone bad.


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