EGR code, rough idle at times

2001 CHEVROLET IMPALA
150,000 MILES
Avatar
J.STIEG
  • MEMBER
  • 361 POSTS
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?
May 22, 2012 at 9:14 AM
Advertisement
Avatar
KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
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
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Attached Media
Jan 18, 2022 at 11:16 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle