Ok, I've gotten all the info i can from searching the forums. My 87 Tii is getting about 4.5-5 mpg right now. I just replaced the o2 sensor yesterday, and that didn't have any effect on my gas milage. I'm just wondering where to go from here, as blowing through a quarter tank every day hardly going anywhere but work and back is getting expensive.

mods that matter:
Majestic stage 2 turbo @ 5 psi, no fcd
stock injectors, stock fuel pump
a/c & heating removed
power steering removed
Racing Beat turbo back exaust
new plugs, 10mm wires
new alternator
new o2 sensor
TPS in range (though i still have horrible idle)

any ideas? i seem to be making about the same hp i did before i had these fuel problems.

 

y do you only make 5 psi? you have full exhaust, im used to seeing more like twice that much with full exhaust on a tII. i'm sure you did already, but i think you should make sure that all your intake exhaust passages have no unatural blockage, like a clogged air filter, or maybe something is not conected properly. sorry, for being so obvious, but another thing i've seen is some people have pulsation dampener leaks and if you did have a leak you would obviously use tons of fuel, but you should be running more than 5 psi i think.i hope this helps

 

yes gas mileage sucks on these cars. I cry everytime the gas prices go up.

 

Check for fuel leaks. I'd also question your fuel filter. 4.5-5mpg is insanely low.