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vr V8 Commodore wont start

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by Devour, Jan 18, 2020.

  1. Devour

    Devour Member

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    i have a holden commodore VR V8 Auto... it cranks but wont start i have replace the spark plugs, the leads, its got a whole new dizzy and is in line with no1 TDC, the ignigtion coil, the ignition module, new battery, new fuel injectors, and the fule tank has been emptyied and cleaned, new fuel andwont start, i had luck with puting fuel down the throttle body and it started up but only ran for 20 seconds and cut out, i then started it again but wouldnt start just kept turning, so i put some more fule down the throttle body and it started again but only ran for the same amount of time then cut out. so i left it for an hour then came back and it wouldnt start at all even with the fuel down it.. i have tryed giving the dizzy a bit of a twist but no good please help???
     
  2. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Fuel pump working? Are the vats off..
     
  3. BlackVXGTS

    BlackVXGTS Well-Known Member

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  4. _R_J_K_

    _R_J_K_ Well-Known Member

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    Can you hear the fuel pump prime when you turn the key to accessories? Are the spark plugs covered in petrol after you crank it for a while?
     
  5. Devour

    Devour Member

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    i havent checked error codes yet, im not to sure how, and i have set the dizzy where the othere one was. but there are two indicaters on the fly wheel.. one is an indented clear as day mark and one is a light scribe witch is in front of the largley indented mark i found the dizzy pointing at cylinder 1 on this lightly scribed mark
     
  6. Devour

    Devour Member

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    not sure what a vat is but yes fuel pump is priming when key is turned
     
  7. Devour

    Devour Member

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    im pretty sure there is no petrol covering my spark plugs as i have pulled them out numerous amount of times whilst trying to get this bitch started and have never come accross that just black soot. and it dose prime
     
  8. Devour

    Devour Member

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    i have had a suggestion from another source and they said it sounded to them like it had no ignition pulse. im not to sure how to tackle this problem.. i have though switched all the fuses around under the bonnet to see if there was a faulty fuse but no luck there either so i put them all back to there original places.. it was running but like a hairy dog..one by one i replaced all of what i have told you and no luck so far i have replaced the alternator as well witch a failed to mention,, but this was my first swap thinging i wasnt getting enough power and i would take it for a 10 minute drive and it would run fine for five minutes then it would just start putting and running rough like it was only firing 5 cylinders and lucky to make it home as it would struggle to hit 70 and then once home and i turn the key of and try and start it again it was as if i had a flat battery Hence why i changed the alternator
     
  9. _R_J_K_

    _R_J_K_ Well-Known Member

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    If the engine runs with Start Ya Bastard or petrol in the throttle then ignition pulse is fine, injector pulse on the other hand...

    Have you also replaced the fuel filter? Blockage from that being clogged is also not unheard of and would fit into the no petrol on the plugs or injectors not delivering fuel.

    Also worth asking, you didn't do anything to the car previous to this happening?
     
    Last edited: Jan 19, 2020
  10. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Have you tried putting the plug against the engine block and test for spark? Also have you tested that every injector is getting 12v with ignition on using a test light, one wire be 12v. Maybe something is wrong in your new dizzy.
     
  11. Devour

    Devour Member

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    Yes, i have replaced the fuel filter, it wont start with start ya bastard or petrol any more, i have petrol going to fuel rail as i have pulled the hose off the rail to check if the fuel is running through, im not to sure if the injectors are actually running or not but when disconnected and connected they make a noise once connected again. is it to do with the dizzy place ment or??? if i turn my dizzy it will turn sumthing on when i twist it a certain distance
     
  12. Devour

    Devour Member

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    The dizzy is brand new, but no i havent done the block test i will try it and i havent checked injectors yet as i dont have a test light
     
  13. Devour

    Devour Member

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    what is spose to happen when i take a plug of spark plug and put it to the block?? am i suppose to then try and start the car and see if sparks fly?
     
  14. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Well going on your post at 8 you have spark, so must be something to do with what you did, I would start over firstly by removing the dizzy and follow this guide, u might of just missed something, [​IMG]
     
  15. _R_J_K_

    _R_J_K_ Well-Known Member

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    Unlikely, but the 20 second starting thing and possible no power to injectors is sometimes a sign of a security signal issue - the ECU can't speak to the BCM or the wrong memcal is installed. So you didn't change anything before all this started happening?

    The thing you're hearing when you turn the dizzy is likely the fuel pump, the hall effect sensor is telling the ECU that the engine is rotating and to send fuel. What brand of dizzy did you get BTW? Injectors making noise would likely be them opening and closing as they work on shorting to ground to open and close.
     
  16. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    "Vehicle Anti Theft System"
    Are both valves closed when you did T.D.C ? You could be out by 180deg. Is your key fob working and touching the slipring?
     
  17. Devour

    Devour Member

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    i will pull it out and do it again making sure that the oil drain hole and drive gear roll pin ar alligned and then reinstall it then get back to you
     
  18. Devour

    Devour Member

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    yes key is touching it dosent have an immobiliser and when you say 180 out dose that mean i have to pull dizzy out and rotate it 180 from where it was pointing?
     
  19. Devour

    Devour Member

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    and wich 2 valves are suppose to be closed??
     
  20. Devour

    Devour Member

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    well before this happened it was running like a hairy dog so i started replacing the thing i said and in the mean time it stoped starting and now i cant even drive it... this happened when i started playing with the dizzy, so then i replaced that. the dizzy is my last replacement.. i replaced every thing else prior to the dizzy and it would start and drive but still running hairy had no guts at all but it was running.. but not any more..
     

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