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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1685
Experience:  GM Grand Master Technician 2007. 14 year experience.
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I have a 98 youkon 4by4 its been in shop months they

Customer Question

I have a 98 youkon 4by4 its been in shop for two months they called me said it was fixed I left the shop got 3miles down the road its doing the same thing agin when I take off it acts like its smothered out then when I stomp on it it runs fine with a little backfire out the exhaust I've replaced O2 sensors mass air flow sensed spider assembly throttle control sensor wires cap plugs rotar now it's showing the code p0304 cylinder 4 misfire detected what else can be done to fix this problem
Submitted: 2 years ago.
Category: GMC
Expert:  Gary replied 2 years ago.
Welcome! My name is ***** ***** I will do my best to assist you with this problem.
I am sorry for the long wait
will it back fire out the exhaust or up the intake throttle body ?