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Really horrible gas mileage

V8 Slayer
03-23-2005, 04:35 PM
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?
redimpss5
03-23-2005, 09:02 PM
How many miles are on it? Could be a clogged cat.
85_305
03-23-2005, 10:14 PM
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 MOFO. Took out the engine for a rebuild, and noticed that the dist. was BEYOND shot (amongst other things, lol)
slimdawson
03-23-2005, 11:27 PM
It could be several things.

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