Bad 02 Sensor?!? BUT I'M NOT N/T! *not the same post!

[HiB00ST]

sup everyone,

i have a question. i get crappy fuel mileage. im talking like 2 mpg or something
ridiculous like that! had more than a 1/4 tank of gas and i raced a Porsche Cayenne
Turbo for about 6-8 blocks and i was on empty!!!

what could cause this? here are my mods.

Evo III 16g, O2 housing, and manifold
2.5 DP to 3" exhaust
NGK wires
stock plugs
stock fuel syst.
Greddy BOV
FMIC

-BTW. i put my T25 back on for a few weeks to see if it was the
Turbo that was causing it but i had the same shitty mileage from the
tiny lil snail! So im not even too sure if its the larger turbo?

Could it be the o2 sensor thats gone bad and makin me
suck up more fuel? its the OG sensor and my car has 84k miles.

***ALSO...whenever i put the clutch pedal in...it makes this screetching sound..
like its the belts when they screeetch...but then i have this NASTY burning smell
coming from under my turbo area. my friend says its the throw out bearing.
cuz now when i put the clutch in..it wants to turn off. and it does!

THANKS EVERYONE!

 

[mitch83]

that second problem sounds like dum dum dum CRANK WALK. does the clutch stick to the floor when you make left hand turns yet. As far as the bad O2 is sounds like it to me I have a bad O2 right now it is doing the same thing. I really hope you dont have crank walk but hey thiers good news now you can get a 6bolt
mitch

 

[philipkrotch]

ya, that sounds liek a bad o2 sensor to me, i got a good one if u need it. 25 shipped.