Shaky idle in cold weather

2000 CHEVROLET SUBURBAN
277,000 MILES • 5.1L • 3 CYL • 4WD • AUTOMATIC
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TRACEY56572
  • MEMBER
  • 1 POST
Hi! My old SUV has idle trouble in very cold weather. It only has a problem after I slow down or come to a stop. I keep it plugged in and indoors at night, and I let it warm up for a long time. The fuel filter and pump were replaced a year and a half ago and fuel lines are not frozen, it is continuously getting worse. Air filter has recently been replaced.
The truck's name is indeed trusty rusty, and I know it has massive amount of miles. Any advice?
PS- it is an eight cylinder 5.3. Not a three cylinder 5.1. LOL.
Jan 14, 2018 at 1:12 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,180 POSTS
Hello,

It sounds like you have a vacuum leak. Can you please follow this guide to confirm or not?

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

and

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

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
Jan 16, 2018 at 10:12 AM
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