i have a 91 3.1l bird
i'm get about 150 miles out of a full tack
does this sound about right?

and yes before you ask i just did a complete
"tomp" tune up not to long ago

 

Not really, others will say they get at least 20 mpg. But don't sweat, my 2.8 got about that. Probably because of the exhaust leak at the manifold. Check all your vacuum lines too.

 

ya thats what i thought........
the funny thing is a almost 90% positive
that i got better mileage B 4 the tune up

 

Man, your car eats more gas than my friends 95 Z28! There is something terribly wrong if you're getting that bad of gas mileage. I get about 20- 22 around town and about 250 or more to a tank. Maybe you just have a MAJOR lead foot? I don't know....

 

I get about 150 too, but I have a heavy foot, and im always have it mashed

 

I get around 400KM's to a tank of Gas. Thats about 22mpg city with a heavy foot.

 

running these small tires, which makes my gear ratio 3.80 and change, I get 280 +/- per tank. So when i get back to stock size SOON I will be back to 330+ per tank. I basically have 16% +/- undersized tires right now.

 

mine gets around 250-300.

When I had to take it up north for a few days, averaged 17.9 in town, in below freezing weather.

 

wow thanks for all the input guy's

 

i usually fill up once a week with 89 octane and usually get 25-300 miles out of it mostly around town and once in a while on the highway. 150 is crapy. you must must must check your wires and fuel economy. something you did when you made your tune up went wrong to 150 mpg. what plugs and wires did you use. did you make your own wires?? maybe you have a weak connection or something. I personally would check the whole car over and make sure everything was put togeter right.