I have a s5 na intake exhaust ported motor safc..... something fishy happed tonight..... started my car... waited to warm up.. started to back out of my driveway... hit gas slipped clutch a little started backing up.... all of a sudden my car pops up in rpm... started reading 20% throttle on safc.....idle really high.... turn motor off... restarted>> idle stuck way high.. safc reads 20% throttle... funny thing is my throttle boddy is at rest during idle... tps rides the cams perfect.... even at idle when throttle body is at rest. tps 6 months old.. new when bought.... freakin weird.. its like safc or ecu took a dump... basically tps/ throttle body at rest safc all of a sudden reads 20%... wtf... freakin weird.... keep in mind car has run perfect for a while now ... and with no changes it goes bonkers.....

 

What voltage does it show at 'rest', what ohms/etc?

 

yea thats what I am figuring..... tps went.... ****** is barely 6 month old..... reset ecu by pulling neg.. bat term.... unpluged tps replugged both no diff you start it>> immediate high idle tps reads 20% but throttle body and tps fisically at rest....... wtf....

 

That's not very good trouble shooting. First, you should find out what ohms the things putting out or voltage, if for some reason the thing doesn't sit at 1v at idle, well then it either slipped off it's bracket, or something is jamming it open. Just test that it's functional and can go from like .6-5 volts or so when moving it by hand.

 

yes that is my course of action now. this freakin happened in the middle of the night. and no real way to diagnose.... so wish me luck... but nothing is jammed. freakin weird

 

Yes there is, the SAFC gives you a listing of the voltages, just check em out!



Haha, beat ya to it!

 

Check the readings under sensor check.

 

SO freakin weird.... yes there was a jam... my cruise controll cable came out of it's sheathing and stuck ... added an inch to my throttle.....so alll is good....
thanks sonic Rat for jogging my mind.. I can trouble shoot other peoples cars in a jiffy. but when it comes to my car its always weird ****, or stupid **** like this.... well I guess it breaking last night kept me from more beeer... it's a toss up....waky