smokemsidwayz302

My 91 5.0 convertible is getting terrible gas mileage. I know these cars aren't anything special on gas but im getting around 12 mpg around town and its F/I. The only things done to it are exhaust and 3:73's. I know the gears arent good for gas mileage but they shouldn't drop it like that I wouldnt think so anyhow. The car runs great and I've got new plug wires, plugs, and a cap and rotor. Could anyone give me some advice as to what may help ? thanks

silver91gt

how old are your oxygen sensors?
exhaust leaks will tell the computer there is too much oxygen in the exhaust and use more fuel to correct this.

FiveLiterRiceEater

thats about what mine gets.

AdderMk2

hrm... i get 22 mpg

must be the way you drive it

silver91gt

I'm lucky if I get 8mpg.
but I am far from stock,

FiveLiterRiceEater

i have a heavy foot.

Stevens91gt

me too..but i dont think if i drove like a puss

that id get anywhere near 22mpg

hrsepwr44

have you replaced the fuel filter lately?????

gr84u

Yeah I get terrible mpg, like 12 if I try hard, I got 60 on 1/2 last tank.. It was sad. I just opted to get new o2's we'll see how it goes, I say that because I did let my engine consume about the volume of a Double Big Gulp of coolant when I took my TB off and the TB to IAC gasket didn't seat properly.

Stevens91gt

haha that sucks