Slightly rough idle - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

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Old 02-06-2015
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Slightly rough idle

I have a 2004 Edge 3.0. At idle it runs slightly rough. Not bad, but just enough that it annoys me. I don't even notice as long as the truck is moving. The idle speed doesn't appear to be low. 600-800 range usually. No CEL or codes.

I've already changed plugs, wires, and coil pack. I've cleaned the throttle body and MAF sensor. I have also run 1/2 bottle seafoam through the brake booster and 1/2 bottle in the gas tank. No change. What else can I try that won't cost much?
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Old 02-06-2015
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Try cleaning the IAC valve
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Old 02-25-2015
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So I tried cleaning the IAC valve. It didn't look dirty at all but I sprayed it out anyway with MAF cleaner. No change in idle. Any other thoughts?
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