Quote:
Originally Posted by danielsatur
Your car wants some Air + fuel!
Replaced Air, fuel filter, clean MAF/iACT sensors, and throttle body.
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He's getting air and fuel. He says it's bucking when the engine is under light load and it is fine under heavy load. A lack of air or fuel would cause problems at the higher RPMs as well as the lower RPMs.
Quote:
Originally Posted by knelleken
sounds like a bad cop (coil on plug)
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Not quite. Like with the air/fuel thing, a bad COP would be noticeable at all power settings, not just low load cruising.
I've had this problem myself and the issue was the with the EGR system.
Quote:
Originally Posted by danielsatur
Replaced Air, fuel filter, clean MAF/iACT sensors, and throttle body.
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You should clean your MAF, TB, and plenum and replace any dirty filters, though. Always helps to eliminate the obvious when diagnosing a problem.