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My old-ish 99 GMC Sonoma pick up is getting horrible gas mileage. It
started having trouble after replacing the fuel pump and fuel line last
fall. I got ripped off by the guy who did it so went to someone I trust
more to fix the small leak and check everything out. 2 tanks later (three
months later...I don't drive this truck all that much) I noticed that I was
barely getting 10 mpg. I took it back to my mechanic and he did a full
tune up and said to bring it back in after 2 tanks. MPG was fine after
tank #1, a little worse after #2 and only 12 MPG on take #3. I'll take it
back in next week but I want to know- does anyone have any idea what else
could be wrong? It is summer so I have been running the AC more, but
should that really make the mpg go down that much? Before last fall, the
truck was getting 17-20 mpg.
boothe
My guess is either contaminants in the fuel line, bad wiring to the fuel
pump,
or the wrong fuel pump or line..
PontiacFan27
The second mechanic checked for problems like that but I guess I'll take it
back again. I just haven't had time in the last few weeks to deal with it.
It will need to go soon though to get the breaks checked so I can get this
thing through inspection. Failed last week on the back breaks. I need to
win the lotto or something so I can get a new car soon...
boothe
