nothing to do with trucks

[mazingo]

Guys I am going crazy here!!! I let my wife keep my truck this week and I drove her 01 malibu , thinking it would save me on gas, but it really sucks. At first I thought it was the TCC soleniod, but now I think it is a sensor or something. Her car has a 3.1 in it and it used to get abou 28 or 29 MPG but now it gets abou 23MPG if that . I am just looking for advice or some one to point me in the right direction. Is there a forum for GM cars ( a good one) ?

Any help would be appreciated. If I cant fix it, Im just gonna DRIVE MY TRUCK at least it has POWER(a little) to go with the sucky gas milelage.

[tmf6902]

I think something is probably wrong with it ( I don't know how to fix it) but my wifes malibu gets 27-28 mpg also with the 3.1.....its sick

[apache sierra]

My 93 grandprix gets about 27 or 28mpg.But it has 260,000miles on it When it was new it would get 31. I remember having to change the fuel filter once and it helped the mileage some,so now I keep a closer eye on the fuel filter and change it regularly. Also the 3.1 is very sensitive to the fuel/air mix so be sure the air filter is clean and there are no obstructions in the intake area.

[asilverblazer]

I would suggest checking tire pressure, alignment (maybe), air filter, fuel filter, plugs and wires, maybe even freshen all the fluids in it.

 

I did all this to my truck and gained considerable fuel economy which has started tapering off, time for me to check it all again.

 

In my case it was approximately 3-5 mpg gained. A lot of the items I mentioned were severly neglected by the previous owner air filter especially.

[mazingo]

I have kept the Oil and air filters changed regularly. The fuel mileage just dropped off one week like you turned off a switch. I think it is a sensor Possibly IAT. I plan to change the fuel filter and trans filter/fluid this weekend. And will check the plugs and Probably change the IAT. I will post my results. Thanks to all.