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11-18-2007, 03:04 PM
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#1 | |
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AF Newbie
Join Date: Oct 2006
Location: Andover, New Jersey
Posts: 6
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98 running really rough
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?
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11-18-2007, 05:49 PM
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#2 | |
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AF - Advisor
 
Join Date: Sep 2005
Location: New London, Missouri
Posts: 16,690
Thanks: 5
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Re: 98 running really rough
What is the fuel pressure now?
Any codes or check engine lights? Any missfire? How is the egr valve?
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