To those who diagnosed my F150

55 50 Ron

Well-known Member
Thanks to all of you. So far it seems to be IAC. Since that's easy to get to, I took it off and noted it looks quite "gummed up". Went for a new one, NAPA could find 1 in Chicago, local Ford parts could find 4 in Memphis, Auto Value had 5 in St Cloud. I ordered from Auto Value - be here tomorrow.

On a hunch, I sprayed Kroil (most of you probably know about that) into the old part and wiggled the slider with a screw driver and put it back on. Started it with slight hesitation but I'll put the new part on anyway.


I also started it while the IAC was removed. It took right off with no noticeable stumbling but it went to 2000 RPM which would be expected.

So thanks to all you mechanics. Your advice is very helpful.
 
The IAC failed on my boat, was dead in the water, had to two it back. I am glad you found the issue, that sounds reasonable with what you stated.
 
Glad to read you got it working. I use to work in a fleet shop and usually had one of those in my box when out doing road calls.
 
When you get the new one don't throw the old one away, put it behind the seat, I put 4 new ones from napa on my ranger, 2 were bad right out of the box, others lasted from 1 to 3 weeks.
 
I cleaned the one on my Mustang with brake cleaner , dried it out and put a drop of oil in it so the piston was lubed , its still good for over a year now.
 

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