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Thread: Fires then dies

  1. #1
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    Fires then dies

    Just finished fitting the alternator that I got from jamest5r,

    Went to fire her up and she fires then dies, if you stand on the throttle it make no difference it fires then dies.

    For the second its running all the normal warning lights are on apart from the engine management light, the battery light goes off when the engine fires but comes back on when it stalls.

    I doubt it's the alternator so I'm at a complete blank what the problem is.

    Anyone have any ideas ?

    Thanks Rob

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Bad earth somewhere??
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    I assume it was running ok before the alternator change?
    Arguing is pointless....she may not be right but she's never wrong

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    Sounds like when you have an incorrect ecu in

    Couldn't be anything to do with flat battery and your custom ecu

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    Quote Originally Posted by The Flying Moose View Post
    I assume it was running ok before the alternator change?
    Quote Originally Posted by Ettienne View Post
    Sounds like when you have an incorrect ecu in

    Couldn't be anything to do with flat battery and your custom ecu
    It ran Ok last Sunday apart from the fact the alternator wasn't charging the battery.

    The starter turns the engine over at normal speed.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    You're plenum chamber hasn't got a crack on the weld somewhere? Wonder if you have a coincidental problem rather than just the alternator?

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    it also sounds like immobiliser or fuel pump....
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    Quote Originally Posted by kmb View Post
    You're plenum chamber hasn't got a crack on the weld somewhere? Wonder if you have a coincidental problem rather than just the alternator?
    having a crack in the plenum won't stop it from running, it will actually just make it rev more, I would be looking at the ecu.
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    If it dies instantly and cleanly after firing ide be looking at spark issues as if it was fuel u would have thought it would run on just a little.
    As colin has said ecu would be a port if call iirc have you fitted COP if not try swapping another ecu in

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    you haven't dislodged a boost hose possibly, sounds similar to what happen when our v70r awd popped its bottom ic hose off...just a though and I hope it's something simple Rob.

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    Quote Originally Posted by PNuT View Post
    it also sounds like immobiliser or fuel pump....
    I would have thought if it was the immobiliser or fuel pump it wouldn't have fired.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Glad you got the alternator OK sounds like immobiliser to me


    T35, 556Nm/410lbft & 361BHP/317WHP

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    Quote Originally Posted by t5 pete View Post
    If it dies instantly and cleanly after firing ide be looking at spark issues as if it was fuel u would have thought it would run on just a little.
    As colin has said ecu would be a port if call iirc have you fitted COP if not try swapping another ecu in
    Yeah I'm running COP and only have the one ecu.

    I've unpluged the ecu overnight to reset it and I'll have look at it tomorrow after work

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Can't you just flash another map onto it?


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    My money is on the immobiliser, they do fire up then die ,

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    I've got a funny feeling the MAF sensor has gone south.

    Had a simular fault shortly after buying the car 10 years ago and that was the MAF.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Quote Originally Posted by Orca2 View Post
    My money is on the immobiliser, they do fire up then die ,
    Yes, that is why I suggested both! Recently I have been stripping everything off my car I don't need & periodically check if it still starts & runs!

    I was a little confused as to what I had done when it started & ran with my modded ecu & the immobiliser ecu was unplugged! I plugged the standard ecu to find out if it was the ecu & it showed these exact symptoms.... fire & die!

    I then had most of the wiring loom out removing un necessary wires & just after I chopped all the immobiliser wires to the ignition ring & ecu I thought I would check & it showed the same symptoms as immobilised! I had a little moment & realised I had left the pink connector below the fuse box un plugged which runs down the drivers side powering the fuel pump! Plugged it back in & she fired straight away....
    http://www.vpcuk.org/forums/image.php?type=sigpic&userid=2552&dateline=1218822  313
    She may not be perfect but i love her anyway....

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    Quote Originally Posted by oblark View Post
    Just finished fitting the alternator that I got from jamest5r,

    Went to fire her up and she fires then dies, if you stand on the throttle it make no difference it fires then dies.

    For the second its running all the normal warning lights are on apart from the engine management light, the battery light goes off when the engine fires but comes back on when it stalls.

    I doubt it's the alternator so I'm at a complete blank what the problem is.

    Anyone have any ideas ?

    Thanks Rob
    Only trying to help as always....Lol........was this the spare alternator i gave James when i sold him my V70?

    If it was it may be faulty as it came from a junk yard cheap and i was going to overhaul it......but didn`t.



    Quote Originally Posted by oblark View Post
    It ran Ok last Sunday apart from the fact the alternator wasn't charging the battery.

    The starter turns the engine over at normal speed.
    Had similar on my Volvo S40, the alternator was kaput but my battery was not flat and although it turned over ok it would not run as the sensors etc take most of the leccy!


    I would seriously try another alternator first if it has not been checked....


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    Quote Originally Posted by oblark View Post
    I've got a funny feeling the MAF sensor has gone south.

    Had a simular fault shortly after buying the car 10 years ago and that was the MAF.
    Both my 4.3 & 4.4 t5's have ran without the maf connected.... easy check!
    http://www.vpcuk.org/forums/image.php?type=sigpic&userid=2552&dateline=1218822  313
    She may not be perfect but i love her anyway....

  22. #20
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    Quote Originally Posted by PNuT View Post
    Both my 4.3 & 4.4 t5's have ran without the maf connected.... easy check!
    My m4.4 has been heavily modified for COP and data logging.

    To the point I can only read the fault codes when the engine is running.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,


 

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