Mechanics

HORRIBLE GAS MILEAGE

Chevrolet Corsica

I just purchased a 1993 Chevy Corsica, 140,000 miles
4cyclinder 2.7L engine. I drove it 40 miles and runs smooth Idols great, maybe a little slug in power, but not bad. It used 3/4 tank of gas! I know I should get better mileage than that!
I am new to this auto repair thing so don' t know much about what I am doing.I was thinking I would start with plugs and filters, then I saw the post about the timing chain, are these models known for that? How much do they cost to fix and can I do it my self?
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Dandar
April 7, 2007.




I would suspect a fuel leak. Going through 3/4 tank of gas in 40 miles is a bit extreme. Follow the fuel lines from front to back and see if you can find a leak.

Tiny
Bootdog
Apr 8, 2007.
Would I have to be going down the road to see the leak? There is nothing under the car and I don't smell gas in or out of the car? I found out this morning that when the gage shows 1/8 tank YOU ARE EMPTY no gas light came on no slug of the engine. JUST STOPPED.
Could this have anything to do with the other?
Like I said I have just purchased this car and haven't done any maintenance checks or anything!
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Tiny
Dandar
Apr 8, 2007.
Just to be sure run the vehicle at idle and make sure you don't see any fuel leakage. If there is no leak then I would then suspect a leaking injector(s).

Tiny
Bootdog
Apr 8, 2007.
I was having the same problem intill I checked my spark plugs, they were gapped more then what they were suppose too. That helped gas mileage alot too.

Tiny
Flaminkiss23
Aug 29, 2009.

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