× 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: '91 Buick Skylark 2.5 unusual backfiring - need ideas.
Posted to Technical Discussion Forum on 6/3/2003

Brian,

I have had a couple of 2.5L engines with exhaust valves hanging open (valve is carboned up in the guide). It has always been one of the cyls in the middle because of the egr heat I think. The v/c comes off easy enough and if you remove the keepers and... Login to read more.