99 GMC code 304
jdod85
09-24-2005, 11:57 AM
any ideas before it goes into the shop? I did put 3M inj clearner in it. Code 304 says cyl 4 misfire. It smothes out the more gas you give it.
jdod85
09-28-2005, 09:41 AM
Shop put in a new injector. Truck runs fine now. However, GM wants $98 for an injector, NAPA (and the shop is a NAPA Shop) wants $78. The shop charged me $160 for an injector. Thats a rip!!!!!!!
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