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Another bad idle problem. Throttle position sensor.

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by Scooter79, Jul 23, 2006.

  1. Scooter79

    Scooter79 New Member

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    Hi everyone. Surprisingly after doing a search I found there's not a lot of info specifically about the TPS. Indirectly, yes, but not directly.

    Anyways, the idle is bad. Started it today and was idling so low that it was almost stalling. Came back to it a few hours later and now it's idling at about 1500rpm then increases up to 2000rpm. Makes no difference when it goes into reverse or drive. I put it into reverse and the wheels nearly launched out from under the car. Not good! I did a check for codes and got "code 19" - Throttle position sensor sticking. Think I'm up for a new TPS. Anyone else had this problem?
     
  2. 88GreenVN

    88GreenVN Next Exit Left

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    Have you cleaned the throttle body?
     
  3. Scooter79

    Scooter79 New Member

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    No. The car only has 112,000k's on it and the TB is pretty clean
     
  4. 88GreenVN

    88GreenVN Next Exit Left

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    I take it that you have had it off and it opens and closes unrestricted.
     
  5. Scooter79

    Scooter79 New Member

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    Yeah. Checked all that. Opens and closes very smoothly. I realy believe that it's a faulty TPS and the fault code backs that up. Just wondering how common this is?
     
  6. 88GreenVN

    88GreenVN Next Exit Left

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    Swaped mine with the vn v8 I have and still ruf idle.... still looking for the problem
     
  7. Scooter79

    Scooter79 New Member

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    Have you done a fault code check?
     
  8. sixshooter

    sixshooter New Member

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    Yes not meaning to be a smartarse here...but I have read a thread before where someone pulled their throttle body off for a clean and stuffed the sensor....what did you use to clean it with ???
     
  9. Scooter79

    Scooter79 New Member

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    You referring to me or 88GreenVN? The idle problem and the code 19 happened before I even touched the Throttle body.
     
  10. digisol

    digisol New Member

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    While it's NOT recomended to spray carby cleaner inside the TPS hole it can be done if carefully keeping the electrical side up, but if you or someone else has done so, it makes the hole dry and the TPS plunger will stick, (it's essentially a tiny piston with a spring behind it and as the piston moves in and out due to manifold vacum it moves to give the correct a/f ratio) a "small" squirt of some CRC wil fix it, if that's all it is.

    Other than that remove the plug going to it and see what happens, it should idle at 1500 or so constant, if it does the TPS is likely kaput.

    After cleaning my T/B the idle dropped but after a squirt of CRC inside the TPS hole the idle dropped another 500, now sits on 800, and about 700 in gear.
     
  11. sixshooter

    sixshooter New Member

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    :bang: my bad I thought you'd said you cleaned it....I should stop trying to give tech advice half asleep...:sleeping:
     
  12. stockvp

    stockvp New Member

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    i cleaned the whole thing with degreaser and after about 3 weeks it was almost stalling like i was running 4 cyl i got a new TPS $40 and IAC valve$85 from holden now shes running sweet i also took out the bellmouth in the inlet manifold
     
  13. Scooter79

    Scooter79 New Member

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    Prices for TPS!!!!

    I called Repco for a TPS. $105

    Then called Holden spare parts - $102.50

    Bloody Hell!!!!:ranting:
     
  14. proto_vr

    proto_vr New Member

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    BLEH

    My Vr is doing the Exact same thing Scooter79, has been donig it since i replaced my Tb with a bored out one, I have been meaning to swap the IAC sensor off the old Tb for a whlie now, I checked the codes but i didn't get any about the TPS, BTW mine did the exact same with the idles, 1500 sometimes jumping to ether 2000 or 1000 after a whlie.

    If you work out what it was let me know :),
     
  15. stylin_vr2

    stylin_vr2 New Member

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    hmm my vr does a similar thing.. when it idles it borderline stalls.. took it to the mechanics n they reckon theres nothing wrong with it.. meh. so long as it doesnt actually stall or anything im not gonna stress.. but if u do figure out what it is lemme no. its eatin me alive!
     
  16. Scooter79

    Scooter79 New Member

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    Well just letting you all know that it was the throttle position sensor. Replaced the sensor, put the throttle body back together and all is good again. I managed to get a new one from a local auto electrician for $73. I've read on this forum that some people got theirs from Holden for about $45 but Holden and Repco both sell them for over $100. Ring around a few auto electricians for prices :thumbsup:
     
  17. digisol

    digisol New Member

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    De-greaser is probably not the right thing to put on the T/B or anywhere inside the vacum holes and such, Nulon T/B /Carb cleaner removes the black cpap instantly, much better than de-greaser and it also dries very quickly, thus the need for a squirt of CRC or similar to allow the piston to move freely in the hole it lives in.

    It's probably worth getting one from the wreckers, they seem to either work or not work, would be a heap cheaper too.
     
  18. deeranp

    deeranp New Member

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    The Gregory's recommends lubricating the IAC pintle with a drop of (clean) engine oil...

    /DP
     
  19. digisol

    digisol New Member

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    Actually the original post read (a small squirt of some CRC wil fix it) no doubt either will do the same job, CRC, WD40 or whatever may have been hinted at was only a guide, there are far better products available than CRC.
     

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