Fairlee

Hello all,

I have a91 GT, 5 speed has very minor mods (pullies, K&N, timing 14*) and I just got a full tune up (plugs, wires, PCV, fuel filter).

I don't really drive it hard and I am getting about 225 kms per tank. That's BAD. I runs great though.

Any ideas?

Fairlee

5.0stang123

Ya im getting bad milage to but not as bad as yours im getting like 260 km to a tank and thats just driving it easy no flooring it or nothing. Mostly shifting at 2 grand some times 3. So in miles im only getting 161 miles out of a full tank. My car stinks though, that could be mostly from the off road pipe but it smells like its running rich.

Hamutoff

fuel filter, yes many change this but each injector has a tiny screen and can also get build up on each injector it can cause it to dribble and loose atomization

have you pulled codes make sure each and every sensor is functioing on the car

what is each cylinder pressure in engine get checked write down each one they need to be at mininum pressure and also need to be - or + a % from each other too

what tire size and pressure? run at max recommended pressure, heavier wheels and tires do not help mpg

Hamutoff

been writing up a crazy document trying to gather ideas to help MPG on specifically fox 5.0

http://www.thatmetalbox.com/automoti...tangfoxMPG.htm

its not done, so.... ideas appriciated

Fairlee

I still have to you pulled codes make sure each and every sensor is functioing on the car.

16 245 in front and 16 255 in back with 35 psi in all.

Fairlee

Fairlee

Could it be a bad maf?

Hamutoff

take it off, they get dirty clean them with the spray can cleaner made to clean maf
the tests will help

5.0stang123 if you have run rich for a while o2 sensors could be affected?