high idle
Senior Member
Joined: Jul 2008
Posts: 58,557
Likes: 1,165
From: Long Beach Calimexifornia
I doubt it, but It's a cheap date & that way you'll have a spare. Try the " Idle IAC Re-range procedure", I mentioned on my Timing bump sidegap info thread. TheWorst scenario would be, it won't work in your situation, but you can't find out w/o trying! Make sure the engine is at normal op. temp. to start w/!
Last edited by ymeski56; Feb 20, 2010 at 10:22 PM.
Junior Member
Joined: Feb 2013
Posts: 1
Likes: 0
Ford F-150 high idle:
After reading just about every blog about what can causes high idle I finally came across my problem. I have replaced the IACV and the problem went away. Than three days later my RPM went up again in the 1800 to 2400 range, so I took the new valve back to the parts house to replace it. With the replacement installed the high idle became intermittent and then permanent again. A friend recommended cleaning the throttle body with Throttle Body Spray Cleaner. So I took the air intake hose off and sprayed Berryman B-12 Carburetor, Choke & Throttle Body Cleaner into the mouth of the body. Went on a test drive… guess what… idle unchanged! Okay, next possibility I read about: Throttle Position Sensor. So I took everything apart again, take the whole Throttle Body off to get to the TP and see that both ‘Butterflies’ are covered with soot on the backside (engine side). They were covered so thick that the little holes in the Butterflies (I call them minimum air passages) were completely plugged!
After cleaning that up with B-12, I even put the old IACV back on and my truck idles like it used to!!! Now I have to figure out where the soot came from. My truck got 150,000 mile on it, maybe I got some intake valves leaking???
Thought I pass this on for those with similar problems hopelessly thinking about replacing one part/sensor after another! Disconnect your air intake, manually open your throttle, stick your finger in to feel the 'back-side' of the butterflies... if your fingers are dirty, take the throttle body off and clean it!
Good luck! Hope it helps.
After reading just about every blog about what can causes high idle I finally came across my problem. I have replaced the IACV and the problem went away. Than three days later my RPM went up again in the 1800 to 2400 range, so I took the new valve back to the parts house to replace it. With the replacement installed the high idle became intermittent and then permanent again. A friend recommended cleaning the throttle body with Throttle Body Spray Cleaner. So I took the air intake hose off and sprayed Berryman B-12 Carburetor, Choke & Throttle Body Cleaner into the mouth of the body. Went on a test drive… guess what… idle unchanged! Okay, next possibility I read about: Throttle Position Sensor. So I took everything apart again, take the whole Throttle Body off to get to the TP and see that both ‘Butterflies’ are covered with soot on the backside (engine side). They were covered so thick that the little holes in the Butterflies (I call them minimum air passages) were completely plugged!
After cleaning that up with B-12, I even put the old IACV back on and my truck idles like it used to!!! Now I have to figure out where the soot came from. My truck got 150,000 mile on it, maybe I got some intake valves leaking???
Thought I pass this on for those with similar problems hopelessly thinking about replacing one part/sensor after another! Disconnect your air intake, manually open your throttle, stick your finger in to feel the 'back-side' of the butterflies... if your fingers are dirty, take the throttle body off and clean it!
Good luck! Hope it helps.