[DriftinCO]

This was an expensive ($251.36 in parts) but easy job.

Truck runs much better now. I couldn't believe how gummed up the old IAC was. A can of fuel injector cleaner and a rag did a great job of removing the gunk from inside the throttle body.

And a minor adjustment of the idle screw (I tinkered with it previously) to get the warm engine idle rpms to around 750 and viola', life is good again.

(I think Chester was homesick for Moab)

 

[Rice Taco]

Truck runs much better now.

 

[cooper4x4]

how did you know that the IAC was bad? my truck is idling around 500 rpm right now.

 

[Crash]

Truck runs much better now.

Isn't that what he said?

 

[VolcomTacoma]

So is it not possible to clean the IAC? My 3.4 idles at about 500 RPM too when fully warmed up and it runs so smooth that you can hardley tell it's on.

 

[TuRD03]

So what is an IAC? How often is it supposed to be replaced? How do you know its going bad?
Thanks

 

[Schuey2002]

IAC = Idle Air Control Valve. It's mounted on the bottom of your throttle body (at least on the 2.7L it is)..

I replaced my last year. It wouldn't move. It's supposed to rotate around to the side that has a cut out in it. Mine was totally jammed up.

Puting a new one on totally fixed that problem.

Obtw, I can't remember how much I paid for mine, but it was nowhere near that $251.00 price..

 

[98 Taco]

did your tacoma really run rougher and lose power?
i have 150 K and I may have the same problem
what did you pay?
how hard was the install?