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2000 Chevy Lumina 3.1L 195k miles -- High RPM at Idle


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masonben84
New User

Sep 29, 2016, 8:57 PM

Post #1 of 2 (599 views)
2000 Chevy Lumina 3.1L 195k miles -- High RPM at Idle Sign In

My 2000 Chevy Lumina (car) has been randomly idling at around 2000 rpm, most frequently when I first start it. I replaced the air intake control valve. I cleaned the throttle body with carb cleaner. It's still doing it. At times, my idle rpm goes back down just below 1000, but about half the time it's up around 2000. Any ideas what to check next? Thanks in advance.


Discretesignals
Ultimate Carjunky / Moderator
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Sep 30, 2016, 4:20 AM

Post #2 of 2 (590 views)
Re: 2000 Chevy Lumina 3.1L 195k miles -- High RPM at Idle Sign In

Any trouble codes stored? If so, what are the numbers?


Do you have a scan tool? If so, compare the IAT to the ECT when the engine is cold with the key on engine off. They should be close to each other. You may need to connect a volt meter to monitor the ECT voltage and see what it does when the problem occurs.





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