Question Idle Air Valve - Toyota Tundra Forums : Tundra Solutions Forum

georgie · #1 (**permalink**) 08-01-2008, 03:21 PM

I understand that a dirty Idle Air Valve could be the source of the rough idle on my 1997 Tacoma with the 2.7 engine.
Is there any way this valve can be cleaned while on the throttle body?
It's located on the bottom side of the throttle body so outside of removing the throttle body there is no way to get to it (or take it off)
Do these valves require periodic cleaning? My Tacoma has 98,000 miles on it (I am the second or third owner) and I doubt it's ever been removed and / or cleaned.
I am assuming that a simple on the car throttle body cleaning wont get it.
Thanks for any input.

HOGWILD · #2 (**permalink**) 08-02-2008, 12:11 AM

rough idle could be lottsa stuff, what has been done to fix?
i would do throttle body and MAF cleaning and air cleaner and see if it runs better and maybe a fuel filter and some fuel injector cleaner! here is a link to a pdf file that could help?
4th file down great product!
Toyota Tacoma 4Runner/ FJ Cruiser FSM Page

georgie · #3 (**permalink**) 08-02-2008, 09:15 AM

Hogwild
Thanks' for your reply.
I have had the throttle body cleaned and used F.I. cleaner. Results were only temporary and didn't really solve the problem.
I guess I will have a professional fuel injection clean before I think of tearing into the throttle body to check the idle air valve.
I have the Chiltons manual for that year /model Toyota but the diagnostics for my particular problem are not very detailed.

HOGWILD · #4 (**permalink**) 08-02-2008, 11:10 AM

Chiltons has been known to make mistakes in printing manuals! That is why i give you the link to download your own Toyota product! Have you reset ECU by disconneting negative battery cable? just a last ditch thought?

georgie · #5 (**permalink**) 08-03-2008, 02:38 PM

Hogwild,
I know... I don't put much stock in Chiltons manuals either.
I will try to download the Toyota FSM from the link you sent me.
I assume you only momentarily disconnect the negative battery cable to reset the ECU.
I will try that first and see what happens.
Thanks again for your advice.

HOGWILD · #6 (**permalink**) 08-03-2008, 06:21 PM

i leave mine off for about an hour, time for me to clean TB&MAF!

The Phoenix · #7 (**permalink**) 08-08-2008, 04:43 PM

To my knowledge, there's no way to clean the IAC Valve without removing the throttle body. It's not that hard to put back on though.