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Originally Posted by radioX5
I just had an upgrade done to my '04 4.8, and it made a huge difference. I don't have the work order here with me at work, but I remember something about an upgraded DME. Before the upgrade, it behaved exactly as yours does.
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I would be obliged for details
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Otherwise, have you had your dealer check for the VANOS Intermediate Valve Lever problem? This is a known PUMA fault item that causes very jerky engine behavoir including moments when the power can virtually cease to deliver.
The UK details are : PUMA 4736767 - dated March 3rd 2005 - Author, John Beckley, Master Technician.
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The local dealership says they cannot find any record of this as it is in the UK.
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