idle problem
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Senior User
Joined: Dec 2009
Posts: 191
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idle problem
Im new to the site, but not new to Fords. I have an 88 mustang that i have rebuilt the motor, tranny and painted it. I figured i didnt want to drive it in the snow this winter, so i picked up an 88 f-150. I have a problem with the way it idles sometimes
When i start it up, it runs like crap. it sounds real tough, a lot like theres a cam in it. it takes a few block of drivin for the idle to smooth out. I thought it was a problem with the open loop circuit, but it continues when the temp gauge registers sometimes too.
Other times it warms up in 2-3 minutes of running, and the idle smooths out like normal. This problem makes it tough to drive because its a 4-speed, and when I let out the clutch, it wants to die, but never actually does.
Any suggestions?
When i start it up, it runs like crap. it sounds real tough, a lot like theres a cam in it. it takes a few block of drivin for the idle to smooth out. I thought it was a problem with the open loop circuit, but it continues when the temp gauge registers sometimes too.
Other times it warms up in 2-3 minutes of running, and the idle smooths out like normal. This problem makes it tough to drive because its a 4-speed, and when I let out the clutch, it wants to die, but never actually does.
Any suggestions?
Posting Guru
Joined: Dec 2008
Posts: 1,007
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From: Sterling, Va
I had the same kind of problem with my 91. check for vaccum leaks that's what mine was and still is alittle i didn't replace them all just the ones that i saw that needed it. there is a way to do a leak test but i don't remember how someone will most likely jump in with more info for ya.
Kyle
Kyle
Fleet Mechanic
Joined: Apr 2008
Posts: 1,724
Likes: 2
From: Vancouver BC Canada
Maybe your egr valve is sticking open a bit when its cold. That can cause some rough idle issues. I had this problem for a while on mine. Spray a little lube on the pintle when the truck is off and move it up and down a few times with a screwdriver. Solved my problem.
Tuned
Joined: Oct 2001
Posts: 483
Likes: 6
From: Pelzer, SC
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Senior User
Joined: Dec 2009
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This would make sense for my problem. did you just spray lube in the slots on the side of the EGR valve? or where did it go into?
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