VW Jetta MKIII/MK3: Starts and dies|Volkswagen Bora
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Thread: Starts and dies

  1. #1

    Default Starts and dies

    Okay here is what i know..

    the problem doesnt happen everytime.. and usually less when the car is warmed up..

    I start the car.. and sometimes the RPMs drop to almost zero and bounce back up..

    but it also will drop all the way and die.

    I will get a video tomorrow. if needed

    so
    94 jetta 2.0

    Just replaced
    plugs
    dist cap
    rotor button


    coolant temp sensor

    Any ideas i did run some fuel treatment today

    wires are a year old...

  2. #2
    rollin deep bikerkid9069 is on a distinguished road bikerkid9069's Avatar
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    Default Re: Starts and dies

    have you changed the fuel filter recently?
    sick of seeing corvette rims on mk4's

  3. #3
    Member SatyS is on a distinguished road SatyS's Avatar
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    Default Re: Starts and dies

    I had this problem and it turned out to be the ECU relay, Number 30.
    .
    ECU Control Relay Part Number: 165 906 381

    Hope this helps. These are prone to fail.

  4. #4

    Default Re: Starts and dies

    i never would have guessed that.. ill try it and the fuel filter

  5. #5
    lowness and dopeness Marc1987 is on a distinguished road Marc1987's Avatar
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    Default Re: Starts and dies

    got a CEL?
    2000 jetta 2.0//all show no go//owned.


    Quote Originally Posted by I4N View Post
    ear sex
    RIP: 1995 black mk3
    build thread

  6. #6

    Default Re: Starts and dies

    OKay so i found the part.. only 4 bucks at a local autoparts store! just got find out the locatoin of the relay

  7. #7

    Default Re: Starts and dies

    yes.. but the rear o2 sensor has been cut out i figured that is way

  8. #8

    Default Re: Starts and dies

    Okay i need tro know which relay i need to take out and replace...

    also video uploading now

  9. #9

  10. #10

    Default Re: Starts and dies

    BUMP can anyone tell me which relay i am replacing on the panel for the ecu?

  11. #11

    Default Re: Starts and dies

    replaced the relay
    middle row
    3rd position


    no help..
    also disconneted the harness for the ISV and it did not help either

  12. #12
    Member SatyS is on a distinguished road SatyS's Avatar
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    Default Re: Starts and dies

    Has your crank sensor ever been changed?

    Can you hear your fuel pump humming when you turn the key?

  13. #13

    Default Re: Starts and dies

    i dont know... and yes.. remeber this problem is intermediant.. its not a constant thing.. more so when its cold.. im going to clean out the isv in a few

  14. #14

    Default Re: Starts and dies

    Cleaned the TB and ISV.. helped a little.. but still does the same thing..

    even when it starts... after it fires the RPMS drop to almost 0 and the back up to common?..

    is that normal? my GTI doesnt do that

  15. #15

    Default Re: Starts and dies

    a note..
    now that ive done all this.. it almost always only does it on the first cold start..

    should i clean the ISV more? i used a whole can of wd40 and cleaned it probably 5 or 6 times

  16. #16
    lowness and dopeness Marc1987 is on a distinguished road Marc1987's Avatar
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    Default Re: Starts and dies

    thats weird man, sounds like maybe your gas lines are freezing up, get some iso heat stuff and run it in the gas.
    2000 jetta 2.0//all show no go//owned.


    Quote Originally Posted by I4N View Post
    ear sex
    RIP: 1995 black mk3
    build thread

  17. #17

    Default Re: Starts and dies

    it doesnt even when its not cold enough to freeze..
    and like i can start it the first time(giving it gas for a second) and it will run fine..

    then i can immediately turn it off.. and it normally starts fine

  18. #18
    Senior Member Green '95 is on a distinguished road Green '95's Avatar
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    Default Re: Starts and dies

    Bad fuel pressure regulator? Could be bleeding your pressure off. I'd also check the air intake temp sensor. If it's cold out and it's reading that it's 145* air coming into the engine it may just not be getting enough fuel.

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