Tps Problem For Idling And Missfire

[RamR33]

hey guys with another problem at hand again need your help.

ive just bought a tps for my sereis 1 R33.

i have done the acc valve cleaning,afm cleaning, new coilpacks ,sparkplugs,but cant fix my idle and very bad fuel economy.

so i thought id try and replace my tps.

ive pluged up the tps and let the car warm up to normal temp on idle with the tps conected and run very bad in missfires and shakes and just runs rich bad and bad fuel economy/performance.

i disconect the tps plug and the idle sky rockets to around 1700/1800rpm and then adjust the screw to set it to around 1000 which is the limit as screw wont really go no more clockwise,maybe just alil more.

but the car runs perfect smooth no smoke, nice note, turn it off no shaking nothing and no missfires.

when pluged back in the tps it goes down to 500/600rpm and i adjust it back up to 1000 threw the screw and runs like crap all the things that stated above that run fine with it off are happening.

am i doing something wrong in adjusting and that,i have a gready e-mange blue one and also my voltage on it is at 1.5v and thought it might be that to but not sure.

any help would be great cause i have no idea wat to do and really missfires on idle and fuel is bad aswell as perfomance wise too.

Edited October 12, 2011 by RamR33

[DVS JEZ]

Has it been tuned? Try disconnecting the 02 sensor and see if that helps

[RamR33]

yea it was tuned but never could thought out the idle issue,can here the exuast making lil poping sounds like trrrr trrr trrr and thought maybe leakings and that but when i disconected the tps plug that all went away and idled almost perfect and no lil poping or missfires.

i havent tryed disconnecting the o2,might try that as cant think of really anything else.

[Moodles2]

I know with RB26 TPS', the ECU expects the voltage when 0% throttle is approx 0.43 and roughly 4.4 with 100% throttle. Try adjusting the TPS with the engine off until it reads 0.4x volts with no throttle

[RamR33]

Thats what i did it was sitting on 1.5v wen and was running like missfire and thought of clears up and then set it to 0.47v and open was 4.9v could here the engine smoothen out and at the exhaust rerally smooth with no lil poping or missfire but idle then just wen up and down like crazy,stalling plus performance wise didnt feel anywhere near the 1.5v wen the way i got the car.

[RamR33]

maybe need to adjust the timing or see wat its on after that?