Question about 1999 Toyota Sienna

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Van shuts down while running

My 1999 will completely shut off while it is idle. The power is still on, and the engine turns, but no connection when I turn the key. Have checked the battery (new) and the alternator. The starter is working, but I still can't seem to get it to run. Any suggestions? I don't want to take it to a shop and have it cost $100's. Thanks for solutions.

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After about 100K + miles the idle air control valve (IAC) begins to collect carbon deposits that interfere with the movement of the spring-loaded valve. You will not be able to clean this without removal and dissembly of the IAC body. Use an emory cloth or fine sandpaper to remove the build up around the valve. This should free it up to rotate without binding. This is a temporary fix, of course, and will either require cleaning again or replacement of the valve. Getting to the IAC requires removal of most of the intake upto, but not including, the intake manifold. Total time is approximately 3-4 hours, but worth it. Good luck, and I hope this helps.

Posted on Feb 21, 2010

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