EGR code, rough idle at times

Tiny
J.STIEG
  • MEMBER
  • 2001 CHEVROLET IMPALA
  • 150,000 MILES
Working on a 01 impala and driver says idle is rough. It seems to idle good now. I checked the codes and I get code p1404. Can I do a harness check. Or what do what would you recommend?
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Tuesday, May 22nd, 2012 AT 4:14 PM

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Tiny
KASEKENNY
  • EXPERT
There are a number of things that can cause this but since you have a code for the EGR that can cause an air fuel imbalance then we need to start with that.

I am attaching the info below on this code so let's start with this and see what we find.

If this code does not turn anything up, then we need to check for a vacuum leak.

here is a guide that will help with this:

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

Please see the attached info and let me know what you find with both of these, and we can go from there.

Thanks
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Tuesday, January 18th, 2022 AT 7:16 PM

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