XM gives up in the heat
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Thread: XM gives up in the heat

  1. #1
    Member ajm212's Avatar
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    Default XM gives up in the heat

    My XM (2000 model V6 24V) has developed a problem with heat and hot days.

    In the last bout of mid 30s temperatures we had, I got about 10km from home when it decided it wasn't going up a slight hill. Attempting to put the slightest load on the motor achieves nothing: the car slows and will eventually stall if pressed. Being very gentle and stopping frequently to let it cool, I was able to nurse it home. Travelling the same distance on a cool night everything was fine. The next day, in the mid to high 20s I got about 10km before I had to abandon it. Once again, in the cool of the night, everything seems fine.

    The fuel and air filters have both been replaced but didn't fix things. I removed the MAP sensor and cleaned it with a non-residual electronic component cleaner. It's now running nicely but the current weather in Melbourne isn't any test for whether this has fixed the problem.

    By the next time it gets really hot, it will be holidays, we will be in the middle of nowhere and stuck. I'm looking for advice about other things I should check to try and nail the problem.

    Thanks,

    Andrew

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  2. #2
    Contented Peugeot Driver addo's Avatar
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    Ignition, a blown coil or two will cause this, and blocked cat.

  3. #3
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    Maybe, the fuel pump? It lives in the tank unit and is a fairly generic item.

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    Fellow Frogger! denxm's Avatar
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    Once on my older xm 12v,it ran out of power,pulled over, waited for it to cool then it got me home,found it was a ignition module.
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  5. #5
    UFO
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    Yes my XM (96 12v V6, so not the same as the OP's) used to get that. I replaced the ignition control module with a Tridon brand I sourced from REPCO and it was all good. Apparently it is the same as a 2 litre Camira - which XM Mechanic found when the ICM on theirs failed on the way to Cit In 2010.
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  6. #6
    Real cars have hydraulics DoubleChevron's Avatar
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    24 valve with be multiple coil/wasted spark wouldn't it I'm sure you'd pick it running on 4 rather than 6 it it was a coil.... So I'd be checking for the TDC sensor
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    Member ajm212's Avatar
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    Thanks for all the suggestions, particularly as in yesterday's warmer weather, it is clearly not fixed.

    I'm wondering which of suggested faults is most consistent with the 'reliability' of the problem. It's not that its more likely to play up in the heat but that below a certain temperature everything's fine and above that temperature the problem switches on like a thermostat. When it happens, it isn't running rough as I thought a coil or ignition problem would be, but that the car is breathless. Hence my initial interest in fuel/air issues.

  8. #8
    Member MikeHolt's Avatar
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    Sounds like a very similar symptom to mine several years ago.....loosing power to a crawl on a hot day.
    see if i can find the record.
    from memory a sensor... /oxygen I think simple fix, . Not ignition or fuel.
    mike
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  9. #9
    WRB
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    I had a go unblocking my "Cat" but the bloody thing buggered off

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