3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Really horrible gas mileage

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Old Mar 23, 2005 | 03:35 PM
  #1  
V8 Slayer's Avatar
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From: Long Island, NY
Really horrible gas mileage

Why is my freggin mileage so damn bad?
The car is a 91 3.1 V6 Firebird and I get about 10 MPG!!

It's had a recent tuneup with everything except the Dist Cap/Rotor and Fuel Filter.The motor runs at a good temp,about 200.Why is my economy so damn bad?
Old Mar 23, 2005 | 08:02 PM
  #2  
redimpss5's Avatar
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From: san leandro ca
Re: Really horrible gas mileage

How many miles are on it? Could be a clogged cat.
Old Mar 23, 2005 | 09:14 PM
  #3  
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From: Holland, NY
Re: Really horrible gas mileage

Could VERY WELL be your distributor. Take it from personal experience. 197k on the car, and still had (i believe) the original distributor. Thing ate gas like a ****. Took out the engine for a rebuild, and noticed that the dist. was BEYOND shot (amongst other things, lol)
Old Mar 23, 2005 | 10:27 PM
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slimdawson's Avatar
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From: New Bern, NC USA
Re: Really horrible gas mileage

It could be several things.

You said everything was replaced. Does this include O2 sensor and MAP sensor? Check those plugs too.
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