Help Gas milege!!!!!!!

[moose_8]

So i have a 91 mazda b2200 carb model 4 cyl

did a full tune up, pulgs wires fuel filter o2 sensor air filter all that stuff
i cut out the cat in case that was plugged

but i still get terrible gas milege
i am getting around 250ish km a tank which is about 50-60 dollars to fill
and it seems to be running fine other wise, i just make the trip from calgary to lethbridge every once and a while ad it takes me a full tank just one way

any input would be good, thanks

[mazda_maniac]

Could be a leaky fuel tank or line?

Sure your timings correct? Are you runing rich at all? Engines not missing is it?

[moose_8]

there are no leaks well none that i can see on the ground or anything like that
engine isn't missing, but it is kind of hard to start sometimes
it idles fine and sounds normal

but i do have smaller overall diameter tires on the truck which i thought may have been the problem too but even around the city the milege is bad too

[Supa Dexta]

edit...

send it to get a tune up..

[carreckless]

I not sure exactly but maybe the engine is consuming too much fuel. Maybe there is a problem between the connections of the engine and the fuel