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Old 01-07-2013, 10:30 PM
timwe775 timwe775 is offline
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Location: adelaide
 
Join Date: Dec 2012
Posts: 7
Mein Auto: E60 M5
Reduced power on E60 M5

Thank you for those that commented. Here is the update from the BMW Dealership.
Computer reported misfiring on Cylinder 3 so (and with no suprise now when you look at Stone Roots comments), a new set of spark plugs was fitted to see if this fixed the problem. It didn't. 2 days later no further news - still looking for source of problem.
Be interesting if it ends up being injectors or manifold as others posted. Will let you know what happens.
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