2006 V Cranks - No Start
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2004-2007 Cadillac CTS-V General Discussion Discussion, 2006 V Cranks - No Start in Cadillac CTS-V Series Forum - 2004 - 2007; So on this beautiful day my V has died. It cranks but does not catch at all, does not run. ...
  1. #1
    Juggernaut850 is offline Cadillac Owners Member
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    2006 V Cranks - No Start

    So on this beautiful day my V has died.

    It cranks but does not catch at all, does not run.

    I read through the forum, searched and it seems like the fuel pump may be the culprit. I have tested the fuel rail and no pressure registers when the pump should be priming the line or when cranking. I even tried pushing in the schreader valve with a screw driver to see if I could get anything to come out and nothing did.

    20 amp fuse (pump) located under the rear seat is fine.

    The tank was low on gas when it was driven last, I added 10 liters through a jerry can today and still the same result.

    Can you help me with a recommendation? I have changed a pump before on my old volvo 850 but that was through an access panel in the trunk, from what the older posts here say that I would have to make my own access panel. Is this wise? Any ideas on dealer cost to repair? How hard to drop the gas tank and go at it that way?

    Thank you in advance....

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  3. #2
    darkman's Avatar
    darkman is offline Cadillac Owners Master
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    Re: 2006 V Cranks - No Start

    I would be tempted to change the fuel filter first - if it encounters enough water it will cease to flow fuel.

    The fuel pump is shown as $500 part and the flat rate time allowance is 4.6 hours to change.

    See attached.

  4. #3
    rand49er's Avatar
    rand49er is offline Cadillac Owners 10000+ Posts
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    Re: 2006 V Cranks - No Start

    Other guys here have done fuel pumps (assuming that's the problem), but from what I gather it's not for the timid.

    How many kilometers on your V?
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

  5. #4
    Juggernaut850 is offline Cadillac Owners Member
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    Re: 2006 V Cranks - No Start

    80K Kilometers on the V....

    I will try changing the fuel filter today. Any other ideas on root cause? (When I turn the key you can hear the relays and such turn under the hood, but it does not sound like the fuel pump is running)

  6. #5
    darkman's Avatar
    darkman is offline Cadillac Owners Master
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    Re: 2006 V Cranks - No Start

    Since the fuel pump lives submerged in the fuel tank I do not know how audible it is. You could turn on the ignition (very briefly) with the fuel filter off as an acid test to see if it is pumping. If you do this, I would have an assistant help and have a water hose ready to rinse down and fuel spillage. I only suggest this since you want to be darn sure the pump is indeed dead before you drop the tank.

    Finally there is thread somewhere that contains a diagram on where to cut your own access in the floor board (under the back seat I think) that would allow direct access to the pump.

  7. #6
    Juggernaut850 is offline Cadillac Owners Member
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    Re: 2006 V Cranks - No Start

    Guys - Thanks for the help so far.

    I have changed the fuel filter today and with it off tried to prime / crank the engine - nothing happened (no fuel flow out of the exposed supply line from the tank).

    So it looks like all roads lead to fuel pump, unless other than the fuse in the back seat there is another fuse / relay that could cause the pump not to operate?

    Any other ideas?

    Again, I appreciate the help....

  8. #7
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
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    Re: 2006 V Cranks - No Start

    There have been cases of the terminal connector at the top "frying".

    It is a BITCH to get at and some have cut a hole instead of dropping everything (rear end ect) to get at it.

  9. #8
    darkman's Avatar
    darkman is offline Cadillac Owners Master
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    Re: 2006 V Cranks - No Start

    Quote Originally Posted by Juggernaut850 View Post
    Guys - Thanks for the help so far.

    I have changed the fuel filter today and with it off tried to prime / crank the engine - nothing happened (no fuel flow out of the exposed supply line from the tank).

    So it looks like all roads lead to fuel pump, unless other than the fuse in the back seat there is another fuse / relay that could cause the pump not to operate?

    Any other ideas?

    Again, I appreciate the help....
    Well the related ground is G401 - see attached. Also, there are two 15A fuses in the Underhood fuse block that control the left and right banks of both fuel injectors and coils. To the extent the ECM has to "see" these circuits for the fuel pump circuit to activate they could be involved, but I doubt that is the case.

    http://www.cadillacforums.com/forums...ess-panel.html

    http://www.cadillacforums.com/forums...fuel-pump.html


    Access Picture here:
    http://www.cadillacforums.com/forums...g-smoking.html

  10. #9
    05velocity is offline Cadillac Owners Member
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    Re: 2006 V Cranks - No Start

    I had the same problem this week just changed the fuel pump out its a $269 part. The relay is in the fuse box under the back seat on the passenger side. Put a volt meter on the switch side of the relay it should have 12 volts for 2 seconds when you turn the ignition key to the run position. You can also feel the relay click when you turn the key to run. If its working have someone listen for the pump at the filler neck with gas cap off while you turn the ignition key to run. They should here it run for 2 seconds. If they don't hear anything its dead, pretty common with GM pumps. I followed the service manual instructions for dropping the tank and still had a hell of time getting the passenger side bolt out. I was looking at this thread about cutting the hole but chickened out.

    http://www.cadillacforums.com/forums...smoking-2.html

  11. #10
    Juggernaut850 is offline Cadillac Owners Member
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    Re: 2006 V Cranks - No Start

    Guys - Thanks for the help, I ended up towing it to the dealer and it was nothing that $1400 couldn't fix.... aka the fuel pump.

    Anyway, Dirk is back now and all is well.

    Again thanks for the quick replies.

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