02 3.9 hard start poor mileage runs rich


Ramrod44
01-09-2007, 09:33 PM
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

hundahunta
01-09-2007, 11:15 PM
any codes??. you probably need to connect a fuel pressure gauge and do a leakdown

Ramrod44
01-10-2007, 05:12 PM
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.

hundahunta
01-10-2007, 11:15 PM
is it a large emission leak a p0455, are you also having excessive oil comsumption??

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