i screwed sumthin up!

[sil820]

i need 2 replace my valve cover gaskets so i did.. i left the car at my friends house and he decided to help on it while i left 2 work he cleaned out my TB and he installed the gaskets and he installed a new 02 sensor that i had... the problem is my car is idling super high n running like crap..it use 2 idle at 800-900 now its idlin at 1800-1950. what do u guys think could have done that? im gonna switch the o2 sensor out 2morr back 2 the old one and hopefully it will be back down.. u guys have any idea what it could b if its not the o2 sensor? thanks for your help

[PROJECTRB240SX]

JUST RE-IDLE/TIME THE ENGINE..... THE OLD SENSOR MAY HAVE BEEN FAULTY AND THE NEW CLEARED THAT UP SO YOU NEED TO RESET TIMING AND IDLE.

[Wulfgang]

He cleaned out the TB? Could he have left a vacuum line open? That would make it idle high. I seriously doubt an O2 sensor could throw the idle off by that much, if at all.

[wga240]

Definitely sounds like a vacuum leak, as Wulfgang suggested.

[sil820]

thats wut i thought it's sumthing leaking..ill recheck everything in an hour..but forsure its not the o2 sensor??? should i reset the ecu? how do i re-idle the engine? mess with the timming? cuzi did that and it was still the same..

[Joe]

yes its a vacuum leak, the o2 sensor dosent affect idle when its running open loop.

[sil820]

could it be the tb gasket at all? b/c mine cracked apart so he bought tb gasket paper thing and made a double of it..

[wga240]

If air is leaking out of the TB to intake manifold gasket then yes that could be it. Do you have a boost/vacuum gauge? If so it should be reading somewhere between 19-20 in mg of vacuum at idle if you have no leaks. If you don't have a boost gauge, it's a fairly cheap and worthwhile investment for detecting vacuum leaks and making sure you're not overboosting

[sil820]

i found it..its the TB sensor..it just had 2 be turned a little...tripped me out man.. i took everything off and put a new gasket.. and it still had the problem..then i noticed u can move the tb sensor so i did and it worked! the werid thing is that after switching the o2 sensor it idles about 100-200 higher and runs slower.... so im gonna switch it back 2day when i getta chance ...and hopefully it will b back up 2 speed again..

[Yellow4g63]

The TPS? Sounds like you need to adjust it. break out the volt meter or use the SAFC2 so you can monitor it when you adjust it.

[sil820]

ya tps i 4got the name for it..i used my rev/speed meter and just watched my idle and set it as far as i could w/ low rpm.

[Yellow4g63]

dose the rev spped show tps voltage? if it dose find out what it's suppose to be at and set it to that voltage.

[sil820]

any 1 kno what the tps voltage should be?? my rev/spd meter only shows battery voltage. after redoing everything my car feels like its running a lil slower.. it idles at 1000 now instead of 800-900.. any clue what it could be?