One or more fuel injectors may become stuck closed causing an engine misfire and the Check Engine Light to illuminate. Our technicians tell us that this problem can be caused by some fuel additives. There are special procedures which may be able to restore the affected injector. If this fails the affected injector must be replaced.Google+
Car Problem Reports
GMC Savana 1500 Check Engine Light and Misfire Due to Stuck Fuel Injectors
GMC Savana 1500 Problem
Engines Affected: 5.0L V8, 5.7L V8
Average Mileage: 171,000 mi (120,000 mi - 210,000 mi)
Visitor, 1998 GMC Savana 1500, 5.7L V8, 210,000 mi
misfire #6 cylinder
Visitor, 2000 GMC Savana 1500, 5.0L V8, 210,000 mi
Misfires runs rough, check engine light on, reads number 6 and 8 not firing changed plugs and wires problem still exist.
Visitor, 2001 GMC Savana 1500, 5.7L V8, 120,000 mi
Cylinder #2 triggered a code. engine runs a little rough. Lower gas mileage. Hoping engine cleaner additive will open up the injector. No luck so far, I'm on second tank of gas after problem occurred.
Visitor, 2000 GMC Savana 1500, 5.7L V8, 144,000 mi