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High and rising idle

Tiny
DUSTYMSS
  • MEMBER
  • 1993 CHEVROLET CAMARO
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 165,000 MILES
When you start the car the idle is a little high as normal cold start. When warm it usually kicks down to normal idle but it didn't, it starts to steady climb. I have change the throttle positioning sensor take out the EGR valve cleaned it to get the IAC cleaned it. I do have a couple of end of the vacuum that are not hooked up I don't know what those that would make that did that or not. Can you help me?
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Thursday, May 23rd, 2019 AT 8:13 AM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

Yes. A vacuum leak would make your vehicle have an high and rising idle.I have included a link below for you to go to:

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

Please go through the guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Thursday, May 23rd, 2019 AT 8:24 AM

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