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'01 Rx300 Slow Idle


Hadyourphil
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This just started happening less than 24 hours ago. I can barely get my car started as it won't idle cold. Not much better when it warms up. Only to the first mark on the tachometer. I have just under 180k, and this car has been super reliable. Where should I start? BTW, it still has the original plugs in it.

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I'd start with the Idle Air Control Valve. If it's gummed up with carbon (which it probably is) it won't allow the engine to idle at the designed RPM. This will be especially noticeable when the engine is cold. Do a search on IACV. This link describes in detail how to get to the IACV and clean it. It's a pretty easy DIY. Care and Feeding of the IACV

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