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Robslexus

Idle Problem

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After about 20 minutes from cold start idle is very rough. Bad sulfur-like smell. Also, when traveling at high speed and taking foot off gas, car jerks.

This problem doesn't happen all the time. I've tried to correlate to wet, cold, hot, humid etc. weather and it just seems like a random occurance. It is happening more and more frequently.

Is there something to adjust?

Help

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98 GS 300 -- might add that after engine is off for about 1/2 hour the problem goes away.

If engine is stopped and started while it's still hot, the idle stays very rough.

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You may want to get your throttle body cleaned and the throttle position sensor tested and adjusted correctly. They can both have an effect on idle.

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And check for obvious things like vacuum pipes or plugs disconnected around that area etc

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