Rough/low idle issue
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Rough/low idle issue
I have an 02 Supercab with 70K miles. It has started to idle rough with the RPMs at 650. When I put it in Park it idles fine at 750 - 800 RPM. I am going to replace the fuel filter this evening, but I wondered if there are other things I should check or clean as well. Thanks for any help or suggestions.
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From: ALABAMA
ddrumman2004 is right I have a 98 f150 and a 99 Expedition. The Expedition got to the point it would not idle at all and I cleaned the IAC /Idle Air Control Unit. It is bolted on the back of the Intake two bolts and a plug at the end. But that did not fix it I had to replace it. If you have any Problems just pm me and I will do what I can to help you out....
Jason
Jason
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Thanks for the info. I replaced the IAC valve yesterday but didn't completely fix the idle problem. It helped, but I am still experiencing a rough idle, just not as bad as before. Any other ideas?
Thanks.
Thanks.
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From: ALABAMA
Check the tube that runs from your PVC valve to the back of the intake. The elbow just under the IAC is known to get a hole and cause it to run/ idle low or rough. That would be the next place I would look.
Jason
Jason
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I checked the hose and elbow I think you are referring to and didn't find any visible leaks. Any other suggestions on what to check? Any way to check for a vacuum leak without taking it to the dealer or a repair shop? Thanks.
