bad tps ?

[MKTURBO3]

so my idle jumps from 1000rpm- 1500 back and forth i hear the clicking from the isc im guessing its a bad tps ? it wont even let me drive wen i put it in first and give it gas i dont move like theres throttle plate is closed when i give it guess... any suggestion guys?

 

[F_T_F]

any codes

 

[MKTURBO3]

nope didnt throw any codes

 

[IwantMKIII]

its a very simple thing to remove and check...take the TPS off and check how the spring is...if its original, you may have a sticky spring. I know i did, my throttle was constantly at 20~25% after the rebuild. When i took it off i realized the spring was basically stuck. No codes will be thrown with that one

 

[MKTURBO3]

where would be the spring be ?

 

[IwantMKIII]

spring is internal, hence you must remove the TPS and play with it to see.

 

[MKTURBO3]

spring is ok i dont have a ohmmeter on me but i put the tps back on knowing the tp is closed i know prolly thats a bad way of doing it but after i started the car and it idle to 1k rpm but when i give it gas it will go straight backto 1500 rpm so i adjusted the throttle cable and still if i give it gas goes back to 1500. bad adjustment on the tps ? or isc ? any1 help guys would be great thanks !

 

[IwantMKIII]

didn't you mark your TPS location when you removed it? When you took it off, the spring works but when it springs back does it go back ALL the way or could you turn it more manually? If TPS is ok, give it a boost leak test, its probably your best bet for that idle problem.

 

[MKTURBO3]

i can move my tps manualy opening it and closeing it is that a bad thing ? i didnt mark it i just adjusted it so that throttle plate is closed. i played around with the adjusting bolt on the cable a little more and now im at a 1100-1200 idle. boosting 6psi no leaks checked for vacuum leaks but none

 

[MKTURBO3]

should the tps be sitting straight side ways cause mine is slight slanted could this be my problem?

 

[IwantMKIII]

The TPS is rather sensitive, even if you think you got it just right, its probably wrong. You need a voltmeter to make sure its in the proper voltage range for idle and WOT

 

[IwantMKIII]

i can move my tps manualy opening it and closeing it is that a bad thing ? i didnt mark it i just adjusted it so that throttle plate is closed. i played around with the adjusting bolt on the cable a little more and now im at a 1100-1200 idle. boosting 6psi no leaks checked for vacuum leaks but none

you say no leaks...how do you know...did you pressure test it or just listen? You can listen all you want...you'll never find them all with the engine noise.

 

[MKTURBO3]

sprayed carb cleaner didnt find anything but yea tom i will go out and get a voltmeter and do it the right way or ill never get this way thanks guys

 

[IwantMKIII]

sprayed carb cleaner didnt find anything but yea tom i will go out and get a voltmeter and do it the right way or ill never get this way thanks guys

FYI: You can't tell with carb cleaner all your leaks, once your under boost who knows what kind of little leaks you may or may not have/develop.