1999 GMC Yukon Q&A
1999 GMC Yukon Question: Misfire
Had a check engine light come on this weekend both times were when I was accelerating up a steep mountain pass. The light would come on and then flash throughout acceleration. Eventually just staying on. The code said it was a Cylinder #4 misfire. Don't remember the code number though. This is the first time this has coded this code. Just recently replaced an o2 sensor that was coding Bank #2 Sensor #2. Any relation? And should I start with the plug or is this something bigger? - Visitor
plugs and coil boots or wires should do it code would be p0304 cyl.4 mis detected - rc parts
no. 3 cylindar misfire with new plugs and wires. - yukon 2
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been to several mechanics and the dealer. only happens when engine is warm, then is misfires, lurches.. like timing maybe off? Spark plugs misfiring? help