98 running really rough
owen11105
11-18-2007, 04:04 PM
98 4.3 liter running very rough. replaced fuel pump, broke tank vent; replaced broken tank vent. replaced spark plugs. blows a lot of hydrocarbons and unburned fuel. seems like its choking itself out. could it possibly be an oxygen sensor?
MT-2500
11-18-2007, 06:49 PM
What is the fuel pressure now?
Any codes or check engine lights?
Any missfire?
How is the egr valve?
Any codes or check engine lights?
Any missfire?
How is the egr valve?
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