× 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: 1996 GMC 5.7 Vortec -oil fouled spark plugs
Posted to Technical Discussion Forum on 1/20/2002

[...trimmed text...]

The intake gaskets on these engines are ABSOLUTE JUNK !! Fuel trim readings should be high if vacuum leak. Smoke machines can safely help find leaks. If no smoke machine, plug off pcv valve hole and p... Login to read more.