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now a starting problem...argh!!!

Discussion in 'VN - VP Holden Commodore (1988 - 1993)' started by ringfeder3, Jul 11, 2018.

  1. ringfeder3

    ringfeder3 Member

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    For some reason i left the key on acc until the battery on my v6 vp drained down to absolutely nothing. i replaced the battery and now cannot get it to start. it will crank all day but just won't kick over.

    this is what i have checked:

    fuel pump relay- ok
    fuel pump fuse- ok
    spark- ok
    fuel pump- whirring happily
    fuel- yes

    the car is on dual fuel. i have not run it on gas during the month i have owned it.

    i have been trying to start it on petrol but it won't start on gas either.

    the security option in the left hand door jamb is 'off'. this hasn't changed.

    as stated, it ran perfectly before the battery died. that's the only thing i have changed.

    any advice will be much appreciated.
     
  2. Deuce

    Deuce Super Stock

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    Spark strong or just ok?
     
  3. ringfeder3

    ringfeder3 Member

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  4. HarryHoudini

    HarryHoudini Member

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    That happened to me many years ago,fuel pump packed it in and the NRMA guy left the ignition on as he tested to see what was wrong.
    It wasn't noticed until the tow truck dropped it off about 2+ hours later,anyway after fuel pump was replaced it would crank but not start,had spark and fuel,eventually we replaced the DFI module & Coil Pack and it fired first turn of the key.Something had burnt out or shorted in the Coil Pack or DFI unit.
    Good luck with it.
     
  5. FXST01

    FXST01 The Grey Man

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    Auto? In Park or Neutral?
     
  6. ringfeder3

    ringfeder3 Member

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    auto. in park. just how i have always started. checked tonight using noid light....no pulse at injectors. hence no fuel to start.... thoughts? i suppose if there is no pulse, then the signal is being blocked somewhere...

    oh, and i drove 230 km return to a donor vp to get a dfi and coil pack with 200k less km on it.
     
  7. ringfeder3

    ringfeder3 Member

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    mate is bringing a tech 1 around on saturday to try and work out any error codes.
     
  8. VPRob

    VPRob Member

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    Grey man said it first: safety position switch. That's where my money is.
     
  9. vc commodore

    vc commodore Well-Known Member

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    How will that effect it starting? I have very limited EFI experience, but having the car in neutral or park shouldn't effect it not starting....Or will it?
     
  10. VPRob

    VPRob Member

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    At the base of the transmission shifter, under the covers, there is a safety switch that senses when the car is in P or N and can therefore safely start, ie, not in gear. The contacts wear, the supports bend/fatigue, compromise the contact and don't sense that the car is in P or N and therefore disable firing. Frequent problem, easy DIY fix, usually no cost. Try moving the shifter around and it may/should make good enough contact to allow starting. If so, that confirms the diagnosis.
    Use the search function you'll find a post on fixing the switch. Keep us posted
     
  11. VPRob

    VPRob Member

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    Also called inhibitor switch. The only question mark in my mind is the fact that it cranks but won't fire. If it's the switch it won't crank at all. Should have thought of that.
     
  12. HarryHoudini

    HarryHoudini Member

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    Yep,that's the easiest method of putting a cut out switch on the ignition,run a toggle somewhere in between the wire that goes to the ignition.Serious Thieves will rip the console apart to bridge wires but it deters most others.
     
  13. ringfeder3

    ringfeder3 Member

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    well my mate came over and checked fuel line to injector rails....plenty of fuel there. put noid light on injectors again...no pulse. connected tech1.....no error codes. hmmm. so he rang and explained history thto old holden mechanic familiar with vps..

    phone was on speaker unbeknownst to mechabic who said: never believe a customer when they say it was just something like ' the key was left on'; they have usually fiddled with something else and they're not telling you..

    so i thought back to the last time i worked on thd car and remembered that i had replaced the panel underneath the glovebox which was missing...

    guess what? a wire had come off a relay associated with the lpg installation. plugged it back in and bingo...ignition.

    moral of the story? keep a good record of work you have done to your car and don't discount anything, no matter how irrelevant you think it is.

    might save hours of unneccesary frustration.

    thanks to all those who replied. i'm learning lots.

    now i wonder if the glovebox panel caused my bl##dy mirrors to stop working .....
     
    FXST01 likes this.
  14. HarryHoudini

    HarryHoudini Member

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    Good News,glad you worked/found out the problem.
     

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