Thread: Help, High idle problem TBI, how the heck do you get it down.
View Single Post
Old 02-08-2018, 03:08 PM   #14
57NAPCO
F’B’D guy
 
57NAPCO's Avatar
 
Join Date: Feb 2004
Location: Texas/Maine
Posts: 2,213
Re: Help, High idle problem TBI, how the heck do you get it down.
Quote:
Originally Posted by arrg View Post

If you stop right here, you should be able to look into the IAC passage on the top of the throttle body and see the end of the IAC pintle as this procedure drives the IAC fully closed. If you can't see the end of the pintle, you've probably found the source of your high idle as the IAC is not fully closing and cannot control your idle.
Did this and the pintle is clearly visible inside the throttle body. So I went ahead turned ignition off and pulled my paper clip grounding device out and for the heck of it started the truck with the IAC still unhooked. The truck started up and idled a lot lower, probally close to where it wants to be. Is this telling me I have a vacuum leak for sure? Or still maybe some other gremlin issue?
Thanks!

Would it hurt anything to drive it with the IAC unplugged ?
Last edited by 57NAPCO; 02-08-2018 at 04:17 PM.
57NAPCO is offline   Reply With Quote