Rough Idle?
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Freshman User
Joined: Jan 2006
Posts: 33
Likes: 0
Rough Idle?
I've noticed lately that my idle has seemed to be really rough. The tach stays steady at about 775ish but you can feel it, almost like theres a miss/hesitation, Sometimes it feels like a cylinder forgets to fire. The plugs we changed about 25,000 ago. I pulles all the COP and checked to make sure thatthere was no moisture inside. When I'm driving down the street thing seem good enige pulls good and no hesitation at all, it only seems to be an idle issue. No check engine light on.
Any ideas???
Any ideas???
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 5
From: Albuquerque
You guys might want to look into cleaning or replacing the IAC (Idle Air Control). They build up with carbon...and can affect the idle.
Take a look at my gallery...I have a step-by-step with pics.
https://www.ford-trucks.com/user_gal...&albumid=22274
Good luck...
biz
Take a look at my gallery...I have a step-by-step with pics.
https://www.ford-trucks.com/user_gal...&albumid=22274
Good luck...
biz
New User
Joined: Feb 2008
Posts: 3
Likes: 0
May have a vacuum leak. The O2 voltage will stay sued lean and fuel trim positive at idle. Best way to find the leak would be with use of a smoke machine. Less conventional way would to use propane or carb cleaner around intake and piping and watch for an rpm change.
