IDLE HESITATION
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Senior User
Joined: Mar 2013
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From: LITTLETON CO
IDLE HESITATION
Getting ready to do a full swap of coils,injectors and plugs but I want to get a handle on an idle (possible problem). Truck is warmed up driving and running perfect, slow to a stop and there is a noticeable delay before I drop to about 700 rpm idle. The truck runs fine but the delay to idle is kind of annoying when breaking to a stop. I also have to give it about 2 seconds before shifting from forward and reverse as to not buck the tranny. Appreciate any input.
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Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
That's exactly the symptoms of a sticking IAC.The PCM tries to adjust the IAC for it's intended idle, finds that it can't, and adjusts other things to accomplish it. I think it does it by retarding the timing. Which affects a lot of other things, and will make it run "weird".
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