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.
Car Problem Reports
GMC 1500 Pickup Check Engine Light and Misfire Due to Stuck Fuel Injectors
GMC 1500 Pickup Problem
Engines Affected: 4.3L V6, 5.7L V8
Average Mileage: 177,037 mi (130,000 mi - 280,151 mi)
Visitor, 1998 GMC 1500 Pickup, 5.7L V8, 280,151 mi
p0304 code,wont hold fuel pressure when fuel pump is off.it also has bad cat codes
Visitor, 1996 GMC 1500 Pickup, 4.3L V6, 140,000 mi
when driving there is a studder when accelerating,also the o2 sensors are needed,and my check engine light is on
I have seen this happen on about a dozen occasions, it is a definite problem with this design of fuel injection, but they do sell an upgrade design as a replacement, which is very nice.