Terrible gas mileage
08-19-2008, 03:25 PM
#1
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Terrible gas mileage
my car has been getting very bad gas mileage just today i burned a quarter of a tank just going to the store, but the car runs perfect and i tuned it up about a month ago could the gauge just be wrong?
08-19-2008, 06:50 PM
#2
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Car: 90 RS/90 Z-71/73 Vega
Engine: 3.1/5.7 TBI/5.7
Transmission: 700R4/700R4/350turbo
Axle/Gears: 3.23/3.42/3.42
Re: Terrible gas mileage
Pull a spark plug and see what the electrode looks like..if its black then ..YOur RIch !!!..and not in the money way.
08-19-2008, 06:55 PM
#3
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Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Re: Terrible gas mileage
sounds like you have a leak, losen your gas cap or run without and see. Often it starts as a small leak that only happens when the pressure builds inside, Then wont leak when not.
08-20-2008, 12:36 AM
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Car: 1992 Firebird
Engine: LH0 V6 3.1 MPFI
Transmission: Automatic
Axle/Gears: 3.23
Re: Terrible gas mileage
I was told that if your EGR goes out then it seriously affects your gas mileage. That's one of the problems my car is having.
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