× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 2000 GMC 7.4L Emissions
Posted to HD/Fleet Forum on 12/19/2006 1 Reply

OK, so it's pig rich at idle. Now, is it open-loop or closed-loop at idle (by design) and what does it actually do at idle (monitoring the O2 sensors)? Login to read more.

1 Replies Received (View Replies)