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vw polo throttle body.

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  • 17-12-2008 11:29pm
    #1
    xseanx
    Registered Users Posts: 195 ✭✭


    Alright so, i drive a 96 vw polo,
    lately when i take the car out of gear to stop,
    the revs drop until the car almost cuts out,
    then they pop back up again.

    ive been told that it may be the throttle body.

    before i clean it, does anyone have any recogmendations or advice?

    cheers


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    #2
    E92
    Closed Accounts Posts: 4,147 ✭✭✭E92


    Poor idling is usually the airflow meter, commonly known as the MAF.

    It's a common problem on VWs and most German cars.

    A throttle body problem would be where there is a time gap between you pressing the accelerator and the engine reacting to this. If the car is idling and you press the accelerator you should instantly hear the engine revving up, not that you press the pedal and 2 seconds later you hear the engine revving.

    If there is this gap then that would usually be a throttle body problem.

    Though that's not to say that the throttle body isn't causing the poor idling, but I'd be looking at the MAF first of all.


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    #3
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    E92 wrote: »
    Poor idling is usually the airflow meter, commonly known as the MAF.

    It's a common problem on VWs and most German cars.

    A throttle body problem would be where there is a time gap between you pressing the accelerator and the engine reacting to this. If the car is idling and you press the accelerator you should instantly hear the engine revving up, not that you press the pedal and 2 seconds later you hear the engine revving.

    If there is this gap then that would usually be a throttle body problem.

    Though that's not to say that the throttle body isn't causing the poor idling, but I'd be looking at the MAF first of all.

    If it is the maf is it a bigger problem to fix?


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    #4
    Anan1
    Registered Users Posts: 22,818 ✭✭✭✭Anan1


    The MAF is a pretty easy swap, but cleaning the throtttle body is cheaper.;)


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    #5
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    cool,
    i'l try cleaning the tb first,
    and se what happens,

    thanks:)


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    #6
    macrubicon
    Registered Users Posts: 637 ✭✭✭macrubicon


    If you do a lot of short trips then it's probably a build up of dirt etc. on the Throttle Body. Common enough issue on Polo's...


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    #7
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    macrubicon wrote: »
    If you do a lot of short trips then it's probably a build up of dirt etc. on the Throttle Body. Common enough issue on Polo's...

    yeah so i have heard.


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    #8
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    Anan1 wrote: »
    The MAF is a pretty easy swap, but cleaning the throtttle body is cheaper.;)

    If it is the maf,
    do you know where abouts it is located?


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    #9
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    I removed the throttle body and cleaned it,
    and put it back into the car.

    the rev's were in and around 7,500 rpm,

    but now they are between 10,500 and 20,00 rpm

    the car is alot louder also.

    is this normal??


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    #10
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    I'd say the throttle needs to be reset using a diagnosis tool/computer.

    For future reference, the best bet is spray cat friendly carb cleaner into the throttle body while revving the engine - this saves having to disconnect it.

    Disconnecting the throttle body wiring means that the angle will have to be reset.
    Untitled Image




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    #11
    the merchant
    Registered Users Posts: 547 ✭✭✭the merchant


    xseanx wrote: »
    Alright so, i drive a 96 vw polo,
    lately when i take the car out of gear to stop,
    the revs drop until the car almost cuts out,
    then they pop back up again.

    ive been told that it may be the throttle body.

    before i clean it, does anyone have any recogmendations or advice?

    cheers

    Sound to me like an Idle Control Valve to be honest.


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    #12
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    the merchant wrote: »
    Sound to me like an Idle Control Valve to be honest.


    Any ideas on how to fix it??
    also do you recomnend driving, while its like this??


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    #13
    the merchant
    Registered Users Posts: 547 ✭✭✭the merchant


    xseanx wrote: »
    Any ideas on how to fix it??
    also do you recomnend driving, while its like this??

    I think that you now have two issues. The original problem which I believe to be the Idle Control Valve. Just buy one (even from a breakers) and see how it goes. Your other problem is the high tick-over which you caused by cleaning the Throttle Body. As Crosstownk suggests this may need re-setting.


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    #14
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    the merchant wrote: »
    I think that you now have two issues. The original problem which I believe to be the Idle Control Valve. Just buy one (even from a breakers) and see how it goes. Your other problem is the high tick-over which you caused by cleaning the Throttle Body. As Crosstownk suggests this may need re-setting.


    I see.

    do you know where the control valve is located??

    thanks for you reply's btw.


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    #15
    the merchant
    Registered Users Posts: 547 ✭✭✭the merchant


    No worries. It's normally on the throttle body, it's a potentiometer that opens the throttle valve slighty when it senses that the car will stall (ala slowing up to the lights).


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    #16
    xseanx
    Registered Users Posts: 195 ✭✭xseanx


    the merchant wrote: »
    No worries. It's normally on the throttle body, it's a potentiometer that opens the throttle valve slighty when it senses that the car will stall (ala slowing up to the lights).


    cool i'l have a look for it tomorow,
    dya think i will be alri diving the car until its fixed?


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