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Idle drops and car stalls when engine warms up

Tiny
LEON NGUYEN
  • MEMBER
  • 2001 LEXUS IS 300
  • 3.0L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 200,000 MILES
The car starts perfectly on cold crank and then once the engine warms up, the idle drops to less than 500 rpm and the car just stalls. If I apply gas, the idle picks and the car runs fine. Please help
Monday, March 13th, 2017 AT 10:59 AM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
Hi Leon,

It sounds like you have a vacuum leak or an IAC motor that is stuck and needs to be cleaned, here is a couple of guides that will help you get the problem fixed.

https://www.2carpros.com/articles/stall-at-idle

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please run some tests and get back to us so we can continue helping you.

Best, Ken

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Wednesday, March 15th, 2017 AT 12:49 PM
Tiny
LEON NGUYEN
  • MEMBER
  • 2 POSTS
Thank you for the input Ken. I will definitely try your ideas and will post a respond as soon as I'm done.
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Wednesday, March 15th, 2017 AT 9:35 PM

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