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01-09-2007, 08:33 PM
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#1 | |
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AF Newbie
Join Date: Jan 2007
Location: Spanaway, Washington
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02 3.9 hard start poor mileage runs rich
I have a 2002 3.9 v-6. It has been a great runner until recently it has got really poor mileage. I haver a 30 gallon tank and was getting 450 miles between fill ups. Now I am lucky to get 330 miles. It takes a lot of effort to start now and when it does it really smells like gas on the exaust end. Has anyone had simular probs with thiers. would love some help. Thanks
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01-09-2007, 10:15 PM
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#2 | |
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AF Enthusiast
Join Date: Aug 2004
Location: Wahiawa, Hawaii
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Re: 02 3.9 hard start poor mileage runs rich
any codes??. you probably need to connect a fuel pressure gauge and do a leakdown
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01-10-2007, 04:12 PM
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#3 | |
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AF Newbie
Thread starter
Join Date: Jan 2007
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Re: 02 3.9 hard start poor mileage runs rich
I forget what the code # but it was a code for a large vac. Leak.
Is it a possibbility that it could be the o2 sensors? The truck has 111k on it. |
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01-10-2007, 10:15 PM
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#4 | |
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AF Enthusiast
Join Date: Aug 2004
Location: Wahiawa, Hawaii
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Re: 02 3.9 hard start poor mileage runs rich
is it a large emission leak a p0455, are you also having excessive oil comsumption??
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