Question about 1998 Toyota 4Runner

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'98 Toyota 4Runner Won't Idle -Intermittent Problem

I commute roughly 32 miles each way every day. Sometimes (once a week) as I pull off the freeway the truck will die when I come to a stop. Once it dies it will start, but it won't idle, and dies if the motor drops below 500 rpm or so. There is no obvious gas smell.
If I park the truck for more than 4 or 5 hours without starting it the problem goes away.
My mechanic checked all vacuum hoses, air intake assembly, etc., and says nothing shows up on the computer. He did replace a dirty inline fuel filter. Since it's an intermittent problem and happens once a week or so, he hasn't had the truck when the problem was present. He also wasn't able to make it happen by driving it. (I told him he needs to drive it like I drive it --like an a**.: )
The problem is independent of how much fuel is in the tank. I have noticed that it happens most frequently when I accelerate big time, into the kickdown, to pass other cars.
Any suggestions?

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  • agnesa Mar 04, 2009

    I have exactly the same problem, on a 1999 6 cyl. 4runner, 2wd

  • notvito Jun 14, 2009

    The guys at Bill's Automotive in Montclair, CA replaced the idle air control assembly. The roller gear inside the part was only rolling partially open, and then only intermittently. They said it was rare for the part to fail in the manner that it did, it's usually either working or not working, but by the time I'd brought the 4Runner in it had failed completely.

  • notvito Jun 14, 2009

    Also had the tranny serviced while it was in, for good measure.

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Hi, I had the same problem. Nothing showed up on the "machine" but the Toyota mechanic replaced the idle control valve. It was pricey but it fixed it.

Posted on Mar 06, 2009

  • nsw1234 Mar 06, 2009

    Good luck!

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Replace throttle control sensor and then repost.

Posted on Feb 07, 2009

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Hello;
The problem could actually be in the transmission. Have the filter and fluid changed and see if the problem recurs. You may havesome dirt in the fluid that is sticking one of the solenoids. Once you stop and rest it for a while, the junk drops to the bottom and you can drive normal again.
Hope this helps and rate me highly.
Thanks;
Rich
RPM Northwest

Posted on Feb 07, 2009

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