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Thread: Jump started, now running rough

  1. 26th March 2013, 07:39 PM #1
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    Jump started, now running rough

    The old man just jump started his TD5 after a flat battery from no use in a couple of months, and as he drove it around the block, it was running pretty rough. Idling was fine, but on acceleration spluttering, missing and overall didn't sound great. Understand, he's certainly no mechanic, and this was the best description he could give.

    Any ideas what might be the problem? Could not driving it for so long, and not giving it a good enough test run be the issue? Would giving it another test drive be an option?
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  2. 26th March 2013, 09:14 PM #2
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    Low battery voltage?
    Old fuel?
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  3. 26th March 2013, 09:24 PM #3
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    Quote Originally Posted by Ranga View Post
    Would giving it another test drive be an option?
    whats wrong with holding the revs at 2000rpm while in the driveway?

    that way if something happens, your still in your driveway and not somewhere else
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  4. 26th March 2013, 09:33 PM #4
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    Could it have gone into limp mode from the jump start?
    The Phantom - Oslo Blue 2001 Td5 SE.
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  5. 26th March 2013, 10:03 PM #5
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    Quote Originally Posted by SiddersC View Post
    Low battery voltage?
    Old fuel?
    That's my thoughts.
    Quote Originally Posted by Disco Muppet View Post
    Could it have gone into limp mode from the jump start?
    That's what I was more worried about
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  6. 27th March 2013, 10:23 AM #6
    disco2_dan
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    Did you use normal jump leads or the safety type
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  7. 27th March 2013, 11:41 AM #7
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    Safety type? What's different between 'normal' and 'safety' jumper leads?
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  8. 27th March 2013, 11:45 AM #8
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    Quote Originally Posted by Ferret View Post
    Safety type? What's different between 'normal' and 'safety' jumper leads?
    the cost, nothing else
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  9. 27th March 2013, 03:02 PM #9
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    At least if it started there's nothing fried absolutely.

    While there's a limp mode (for instance, in the V8 if a MAF fails the auto can go nuts, cut fuel, add fuel and generally be unpleasant) there's no setting to turn it off. It seems to be based on sensor input and what the ECU likes and doesn't like.
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  10. 27th March 2013, 03:17 PM #10
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    disconnect the battery neg and see if that resets it.
    also a new fuel filter would not harm if been sitting a while.
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