Not sure if this is an IAC issue or not, so here goes. When coming to a stop, taking my foot off of the gas pedal the engine stays around 1000 rpm's. This causes me to press harder on the brake pedal. Only when I am about to come to complete stop do the rpm's come down to normal idle ( most of the time ). At 1000 rpm's, I can feel the engine pulling, so I need to get this resolved before I rear end somebody.

Any ideas or suggestion?

Thank you,
David

 

Maybe the PCV valve is stuck. Have you rplaced it at all? I remember i had the same problem and that is what finally fixed it

 

The PCV valve is not that old but I will take a look at that first.

One other note is that it does this hot or cold (engine and\or outside temp).

Thanks!

 

Revive.

Got same thing going on right after cleaning MAF/intake/replacing air filter. Did your PCV swap do it for ya?

 

High idle would suggest to me a sticking IAC, not an unusual problem. If idle did not drop a vacuum leak is indicated. Does the idle drop when removing your foot from brake pedal? If so a leaking vacuum brake booster is indicated. Do not bother trying cleaning IAC as results not consistent and part is relatively inexpensive.

 

Was considering IAC...my idle seems high for too long, doesn't drop quickly at stop or start up (beyond reasonable warm-up). Brake pedal seems to have no effect, but I do have to brake harder than normal as the idle still leaves that torque wound up a bit.

I've tried to clean an IAC on my son's Bird, but that was a waste. Ended up replacing anyway. I'll try to find one on the ol' ebay...

 

My 1999 F150 5.4L was doing the same thing. About 1000rpms. 2-3 seconds after coming to a stop, it would drop. You could smell the brakes from the extra braking.
Sometimes it would "idle" at 50mph.... like have the cruise control on. Bottom line it was a vacuum leak. (I don't really want to talk about it, but it was a missing gasket on the IAC.)

 

(Thanks for not talking about it...)

 

I had similar issues earlier this year and the throttle position sensor was bad. It was about $35.00 from Oreilly and easy to replace. Two screws and an electrical connection. Its mounted on the side of the throttle body. Several easy to remove items had to come off for access and took about 30 minutes. Hope this helps.

 

How about the status of this issue? Is it fixed and what was the problem?

 

Not yet for me...extra funds went to other pressing matters...holding pattern for now.

 

the IAC can be as simple and as cheap as a can of throttle body cleaner and some WD40 to lube it with.75 percent of the time cleaning it it good enough.

 

Is somthing keeping the throttle body open, like junk in there, or is that cable too tight?

 

There gunk in the IAC. it is sticking. Remove the gunk lube good and you're Idle issue are likely over.

 

This I believe true. Now on my son's '93 5.0 Bird, this did not work and a new part did the trick. Cleaned the crap out of that 20+ year old thing! But it was 20+ years old...

It's simple enough and worth the try though, to save some green.

The funny thing about my truck though, is that the problem sorta materialized after I cleaned the intake and MAF sensor and went back to an OEM paper air filter. I'll tinker...