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Thread: SY Territory Cold start issue

  1. #1
    Resident Expert too_much_boost's Avatar
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    SY Territory Cold start issue

    Hi All

    Hoping you can help me diagnose a problem with my partners SY with ZF

    The issue is that the first time I start it in the morning, it starts fine, idles fine, then start driving it and 10-20m up the road it loses all power then stalls

    Restarts fine, then 10-20m up the road it does the same thing

    After doing this 2-3 times its fine.

    Where should i be looking? No major fault codes. Mechanic diagnosed dying battery so replaced that but this issue still exists.

    Its annoying as we want to sell the car now but can't sell it like that

    Thanks in advance
    Disclaimer: I may have no idea what I am talking about

  2. #2
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    Aren't the intake manifold gaskets on these known for problems ?? You might have an intake leak that closes up a bit once the engine has started to warm up. Usually they don't stall though - just run rough & a bit of a miss.

  3. #3
    Resident Expert too_much_boost's Avatar
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    Yeah i thought of that but it doesn't run rough or miss - just loses all power then stalls
    Disclaimer: I may have no idea what I am talking about

  4. #4
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    Fuel pump ??

  5. #5
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    Is it dual fuel?

  6. #6
    Resident Expert too_much_boost's Avatar
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    not dual fuel
    Disclaimer: I may have no idea what I am talking about

  7. #7
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    Throttle body? They sometimes have faults, but you'd think you'd get a code.
    They aren't expensive for the whole unit with sensors from the wrecker so might be worth a shot.

  8. #8
    Resident Expert too_much_boost's Avatar
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    Replaced fuel pump yesterday, no difference

    O2 sensors were recently replaced too (but my understanding they don't do anything when the engine is cold)

    What next?
    Disclaimer: I may have no idea what I am talking about

  9. #9
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    Weird.... Can you replicate whilst starting/idling & then when it happens pull the sparkplugs & see if one or more of them don't quite look right (might help narrow it down to a particular cylinder or two). I'd also be checking all the wiring, fuses & connections on the fuel injectors.

  10. #10
    Pantry dweller Ant_ny's Avatar
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    I had a similar issue with mine, it ended up being the ECU.
    =

  11. #11
    Resident Expert too_much_boost's Avatar
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    So i have an update

    I disconnected the battery for a couple of days (we dont use the car anyway)
    Reconnected it this morning and blasted off dead cold (which is when the issue is worst)

    No issue. It went and drove as good as an NA territory could be expected to go. No stalling, no hesitation

    I'm not getting too excited yet and will drive it for a couple of days to ensure this 'running perfect' business isn't an anomoly, but my theory is that the car had been running with a slowly dying battery for months, and the TB/ECU had learnt some weird/bad behaviours under these conditions
    Mechanic swapped out the battery, but didn't leave it disconnected long enough to reset the ecu, so now the ECU/TB was confused about all this nice voltage it was seeing.

    Anyway, I have a spare TB to try if the issue returns. I hope it doesn't (at least till i sell the car)
    Disclaimer: I may have no idea what I am talking about

  12. #12
    GOTCHYADICKINAGIN Hjtonner's Avatar
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    have had a few fuel regulators on the barra 6s die giving similar issues

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