HORRIBLE GAS MILEAGE

  • Tiny
  • dandar
  • 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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Saturday, April 7th, 2007 AT 11:28 PM

4 Replies

  • Tiny
  • bootdog
  • Member

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.

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Sunday, April 8th, 2007 AT 6:38 AM
  • Tiny
  • dandar
  • Member

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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Sunday, April 8th, 2007 AT 11:46 AM
  • Tiny
  • bootdog
  • Member

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).

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Sunday, April 8th, 2007 AT 2:27 PM
  • Tiny
  • flaminkiss23
  • Member

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.

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Saturday, August 29th, 2009 AT 11:32 PM

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