1989 Jetta carat starts... sometimes.

Discussion in 'Engines' started by montoni, Feb 14, 2018.

  1. montoni New Member

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    I have a weird issue where ill turn the key of the car and the fuel pump won't prime, then I try another time and it will turn on. 5 minutes after that it primes and starts but if I wait a few hours it does not prime. I replaced the relay and fuse. Im stumped.
     
  2. notenoughtime

    notenoughtime Moderator Moderator

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    Try bridging the relay after its left for a few hours maybe a sticky pump
     
  3. montoni New Member

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    sticky pump would mean bad one? I have a parts car with a working one i might just slap that in.
     
  4. notenoughtime

    notenoughtime Moderator Moderator

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    Bridge the relay first before changing pump
     
  5. montoni New Member

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    what do you mean bridge the relay?
     
  6. rubjonny

    rubjonny Administrator Staff Member Admin

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    an easy way is swap a 17/18/100 relay into the fuel relay slot, fuel pump should then always come on with ignition
     
  7. montoni New Member

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    ok did that and the fuel pump went on and cranks but now dosent start still.
     
  8. montoni New Member

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    REALLY WEIRD, if i adjust these screws and crank it it sometimes starts.
    [​IMG]
     
  9. montoni New Member

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  10. montoni New Member

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  11. Finite

    Finite Paid Member Paid Member

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    [​IMG]

    Is anything else intermittent on the electrics? The ignition switch could be on its way out.
     
  12. montoni New Member

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    yea i just changed it out with a good one i had from my old car, still having weird issues.
     
  13. montoni New Member

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    I redid the grounds under the hood, the ignition switch, took out the old ****ty alarm system and crimped the ignition wires back, changed the battery and dist, cap and rotor and STILL have a intermittent starting issue.
     
  14. rubjonny

    rubjonny Administrator Staff Member Admin

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    have a look at the ecu relay next if its an 8v, 32 in slot 3. put the original fuel relay then listen/feel the ecu relay every time you switch on the ignition, if it doesnt click at the same time it wont start/prime then you have found the culpret :)

    you can use a mk3 golf one #30, those are cheap and available at the dealers
     
  15. montoni New Member

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    Yo your a life savor!!!! I think it worked!!! now i just gotta test it out this has had me stumped for 1 months
     
  16. rubjonny

    rubjonny Administrator Staff Member Admin

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    good stuff, keep us informed :)
     

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