Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

2000 VS Ute struggling to start when cold

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by Andyp3, Nov 8, 2019.

  1. Andyp3

    Andyp3 New Member

    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    1
    Joined:
    Nov 8, 2019
    Location:
    Melbourne
    Members Ride:
    2000 VS Commodore V6
    Hey all,

    I’ve got a VS Ute that’s struggling to start when cold. It can take 1-2 minutes of cranking when cold to start. Once it’s been running for a few seconds, if you turn it off and on again it fires up immediately. The engine runs perfectly once it starts.
    I’ve replaced the plugs and leads, run injector cleaner through it, and done some long trips with premium 98 in it. Car has done 180,000kms.

    Any suggestions what it could be? I’m thinking fuel pump, but not certain. Any tests I can do to check?
    Thanks lads
     
  2. losh1971

    losh1971 Well-Known Member

    Messages:
    6,637
    Likes Received:
    1,821
    Trophy Points:
    113
    Joined:
    Jan 17, 2010
    Location:
    North Tas
    Members Ride:
    VR Ute V6
    Could be a battery issue if its a V6. Mine did a similar thing, not 1-2 minutes though as that would have flattened the battery. Try charging the battery overnight and see if it improves.
     
  3. commodore665

    commodore665 expat Saffa

    Messages:
    2,720
    Likes Received:
    1,155
    Trophy Points:
    113
    Joined:
    Dec 30, 2011
    Location:
    New Zealand via Cape Town
    Members Ride:
    2005 SV6 & Alfa Romeo 156 V6
    try cleaning the terminals on the battery , or as above charge over night .
     
  4. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

    Messages:
    14,348
    Likes Received:
    2,314
    Trophy Points:
    113
    Joined:
    Apr 15, 2006
    Location:
    Sth Auck, NZ
    Members Ride:
    HSV VS Senator, VX s2 Calais S/C
    Check the fuel pressure. Does the fuel pump prime when you turn the ignition on?
     
  5. commodore665

    commodore665 expat Saffa

    Messages:
    2,720
    Likes Received:
    1,155
    Trophy Points:
    113
    Joined:
    Dec 30, 2011
    Location:
    New Zealand via Cape Town
    Members Ride:
    2005 SV6 & Alfa Romeo 156 V6
    or this ^^^
     
  6. Andyp3

    Andyp3 New Member

    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    1
    Joined:
    Nov 8, 2019
    Location:
    Melbourne
    Members Ride:
    2000 VS Commodore V6
    Battery is fully charged, and issue is still persisting.
    It’s thrown some error codes, which are 46 and 49.

    I don’t suspect fuel pump as it runs perfectly once it’s started. The pump primes when the ignition is turned. I did a trip from Sydney to Melbourne in it last weekend - no issues there.

    I’m thinking crank angle sensor, coil packs or dfi. Any suggestions to rule each of these out?
     
  7. losh1971

    losh1971 Well-Known Member

    Messages:
    6,637
    Likes Received:
    1,821
    Trophy Points:
    113
    Joined:
    Jan 17, 2010
    Location:
    North Tas
    Members Ride:
    VR Ute V6
    Cam sensor and or crank sensor. Crank sensors can have some intermittent problems before failing altogether. Could also be a problem with DFI as code 46 is sometimes related to DFI. I'd be inclined to start with replacing the crank sensor as they eventually fail regardless and its only a matter of time before it does fail. It would be worth cleaning the DFI plug and checking the harness.
     
  8. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

    Messages:
    14,348
    Likes Received:
    2,314
    Trophy Points:
    113
    Joined:
    Apr 15, 2006
    Location:
    Sth Auck, NZ
    Members Ride:
    HSV VS Senator, VX s2 Calais S/C
    Probably should have led with the fault codes...
     
    losh1971 likes this.
  9. Trevor loves holden.

    Trevor loves holden. Well-Known Member

    Messages:
    1,144
    Likes Received:
    219
    Trophy Points:
    63
    Joined:
    Jun 6, 2019
    Location:
    Victoria
    Members Ride:
    vs commodore
    When was the fuel filter last replaced? Try turning the key on and off a few times without starting it first, then start it and see if it starts quicker when cold.
     
  10. Trevor loves holden.

    Trevor loves holden. Well-Known Member

    Messages:
    1,144
    Likes Received:
    219
    Trophy Points:
    63
    Joined:
    Jun 6, 2019
    Location:
    Victoria
    Members Ride:
    vs commodore
    You can test the leads for spark with a tester when cold to see if they are sparking..
    If it was any of these then it would play up while driving too, CAS fail when hot most times so I rule that out, could be a bad earth but sound more likely fuel pressure related.
     
  11. losh1971

    losh1971 Well-Known Member

    Messages:
    6,637
    Likes Received:
    1,821
    Trophy Points:
    113
    Joined:
    Jan 17, 2010
    Location:
    North Tas
    Members Ride:
    VR Ute V6
    My last CAS fail occurred intermittently. Engine would stop when hot and driving for 45 mins, other times it would fail five mins after starting.
     
  12. losh1971

    losh1971 Well-Known Member

    Messages:
    6,637
    Likes Received:
    1,821
    Trophy Points:
    113
    Joined:
    Jan 17, 2010
    Location:
    North Tas
    Members Ride:
    VR Ute V6
    While its a good idea to swap fuel filters as part of regular maintenance. The OP mentioned two codes. I think that's a pretty good indication he has a problem with the ignition system somewhere. ;)
     
    VS_Pete and Lex like this.
  13. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

    Messages:
    14,348
    Likes Received:
    2,314
    Trophy Points:
    113
    Joined:
    Apr 15, 2006
    Location:
    Sth Auck, NZ
    Members Ride:
    HSV VS Senator, VX s2 Calais S/C
    ^^^^ This :)
     
  14. Trevor loves holden.

    Trevor loves holden. Well-Known Member

    Messages:
    1,144
    Likes Received:
    219
    Trophy Points:
    63
    Joined:
    Jun 6, 2019
    Location:
    Victoria
    Members Ride:
    vs commodore
    Before wasting money on a new CAS get the codes cleared first to see if they come back, if you drove from Sydney to Melbourne then its not your CAS it would of failed in that trip, if anything it be a bad contact or a wire on your DFI plug which is throwing the code, look at those pins in the DFI plug they can bend and make a bad contact, like was said above give it a good clean with contact cleaner. His a link on testing your system, https://www.google.com/url?sa=t&rct...e_Manual.pdf&usg=AOvVaw25UkWBcLeiUsL0vJ7WQXQp
     
  15. Andyp3

    Andyp3 New Member

    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    1
    Joined:
    Nov 8, 2019
    Location:
    Melbourne
    Members Ride:
    2000 VS Commodore V6
    Thanks for the link Trevor. I've seen that the fuel pump won't prime again unless waiting for 15 seconds. I tried it repeatedly, but would've only got one squirt of fuel which wouldn't be enough. I'll test the engine when cold by letting the fuel pump prime 5-6 times, and then try cranking.

    I've almost replaced the entire ignition system (plugs, leads, coils and DFI), so I'm not beginning to think it's the CAS with an intermittent fault or the fuel pump. Given the car drives extremely well once it's started, I'm leaning toward fuel pump. The fuel pump test will hopefully let me know which it is.
     
  16. Trevor loves holden.

    Trevor loves holden. Well-Known Member

    Messages:
    1,144
    Likes Received:
    219
    Trophy Points:
    63
    Joined:
    Jun 6, 2019
    Location:
    Victoria
    Members Ride:
    vs commodore
    Just turn on and off repeatedly every 10 seconds that will help prime the line before starting, have you tried swapping over relays under the bonnet, also look at the wiring under the car that feeds the fuel pump for small breaks causing the wirers to be exposed.
    To test the pump run a wire from your battery + to the fuel pump direct it be the purple wire to see if the pump is working fine, Other than that it can be your BCM not sending earth to activate the fuel pump relay maybe the immobiliser or your key fob not touching the ring around your key barrel properly. Good luck.
     

Share This Page