Question about Volkswagen Jetta

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96 VW Jetta Trek 2.0 engine Problem with idling i have changed the speed sensor already it runs rather well while driving but as soon as my foots off the gas pedal it stalls.

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  • Bob Alarie
    Bob Alarie Jul 15, 2008

    Ok Thanks I have replaced the Air Filter also the codes are as folows, p1582 Speed sensor I have replaced not getting that any more the rest are as follows, P0506, P0172, PO300, P0304, P0301 does that help

  • Bob Alarie
    Bob Alarie Jul 15, 2008

    Alternator, no problem with charging at all, how would i check to be sure. starts all the time, no dimming on deceleration

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4 Answers

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Try three things:
See if the idle increases when the A/C is turn on, maybe the idle increase is stuck. This isn't likely, but it's worth checking.
Clean your throttle body with carb cleaner.
Clean your idle stabilizer with carb cleaner.

If none of these work, replaced coil assembly and relay.

Posted on Jul 15, 2008

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You may want to try cleaning out your throttle positioning sensor. if that helps at all you may even want to replace it. You may have to have to reset/relearn your computer.
Thanks,
Lee

Posted on Jul 15, 2008

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Dear customer


PL check ur alternator
Thank u

Posted on Jul 15, 2008

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To be certin of the actual cause you will have to get a diagnostic run on the vehicle..

But from the top of my head,
1.) Check the air flow meter(sensor) this can attribute to idling problems

2.) Maybe your fuel injection system needs servicing, check your gas filter for any signs of dregs, this is a sign of a MUCH needed servicing even if its clean dont rule the servicing out

3.) DNT ADJUST THE IDELING SCREW, this is computer controlled , you will need an autodiagnostic tool(scanner) to help reset the ideling..

I4.) Check the Air filter, This is the primary cause of rough ideling. You can just take it out and see if the performance changes, this is how most machanics check the filter, oh and it also looks dirty.

my money is on the Air Flow Sensor or the Air filter

Posted on Jul 15, 2008

  • 3 more comments 
  • Rishi Roshan Ali Jul 15, 2008

    PO300, P0304, P0301 #1, #3, #4 injectors



    and air flow sensor P0172



    P0506 throttle body position sensor



    Have a look at the above and post back to let me know what happens

  • Rishi Roshan Ali Jul 15, 2008

    I'm thinking you need to service the throttle body and the fuel injection system. that means replacing oil and gas filters as well as changing the transmission oil and engine oil. if you have done so recently. Do u have a second diagnostic scanner that translates the codes or a terminator to check the throttle body position sensor and the mass air flow meter ( sir flow sensor)

  • Rishi Roshan Ali Jul 15, 2008

    BTW PO300, P0304, P0301 does not necessarly mean injectors, I'm assuming the brain box senses misfireing and are displaying them as these, some diagnostic tools dont have translation for them as it varys in OBD1 tech. and some OBD2 doesnt have them

  • Rishi Roshan Ali Jul 15, 2008

    I heavily doubth the problem is eletrical like the alternator, its deffinately an air flow / gas / timing / accelleration / sensor problem.

  • Rishi Roshan Ali Jul 16, 2008

    ahh dont use carb.. cleaner in the throttle body, its too abrasive,, use power foam..

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tdisline_179.jpg


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Please do rate my response. Thanks!

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