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Thread: Cold Weather = Rough Starting

  1. #1
    Regular Member DesignforLife's Avatar
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    Question Cold Weather = Rough Starting

    Hi all,

    hope someone can help out here... I have a Signum 1.9CDti 150 Auto with 9K on the clock. Bought 2 weeks ago - all has been well. Only modification has been fitment of my 5 month old DTUK 'Green' box (set at 1oclock).

    I have noticed with the very low temps over the last few days:

    * When Cold starting the engine cranks longer & starts rough (chuggy)
    * The engine sounds nosier (I know its a diesel!!) & sluggish.

    Help!! It clears so so when warm & MPG seems ok etc - Is it the DTUK box causing this or is it something normal/ abnormal??

    P.S - My Astra had same engine with the same Box - with none of the above.....

    Cheers - Matt

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    Regular Member Harry's Avatar
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    try taking the box off for a few days and see what happens.

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    Regular Member DesignforLife's Avatar
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    Thumbs up Its Fruggin Freezin!!

    Thanks for pointing that out Harry

    Its fuggin freezin out there at the mo!! Was hoping to get the box off tonight but those plastic clips are a mare in this weather!!

    Matt

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    sorry mate i know its the obvious thing to do...but can't think of anything else to suggest

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    Regular Member ion's Avatar
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    Yes, it's deffo the box.

    My CR1 does exactly the same.

    As the temp really drops more fuel is pushed in to aid starting.

    With a box on this is too much & makes it chug for a few seconds.

    My CR1 is off until conditions improve.

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    Regular Member DesignforLife's Avatar
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    Thumbs up

    Thanks ION,

    will remove when it warms up mid - morning!! Cheers - Matt

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    Could be partially waxing diesel. If the car's been sitting on a forecourt for several months you might still have some summer diesel in the tank which will wax-up in cold weather.

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    Quote Originally Posted by DesignforLife View Post
    Thanks ION,

    will remove when it warms up mid - morning!! Cheers - Matt
    If it's adjustable,try turning it down a couple of clicks.

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    Regular Member DesignforLife's Avatar
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    Thumbs up

    Thanks for the ideas chaps.

    * Waxing in fuel: - The car was on the forcourt for 4 weeks, Dec/Jan. + The first time I filled the tank - in went a bottle of injector cleaner.

    * Box is set at 1oclock - this is how they come from DTUK (should be around +15bhp & 10% torque at this setting.

    Update: - Box is off & guess what - none of the original symptoms - though it hasnt been as cold up here this week.

    Cheers, Matt

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