Anonymous posted an answer for this 2002 Chevrolet S-10:
"you have a clogged catt converter or replace the egr valve"
Anonymous posted an answer for this 2004 Chevrolet Silverado 1500 Crew Cab:
"you should get it serviced right away you have a misfire and can do damage to the engine..."
Anonymous posted an answer for this 1997 GMC Jimmy:
"have bad news for you the valve springs get weak on the 4.3L motor and gonna need to get..."
Anonymous posted an answer for this 2001 Chevrolet Blazer:
"there is a vacuum solonoid on the firewall in the middle with 2 vac lines and a 2 wire..."