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Check if you have oil leaks, you did valve cover gasket both bank and all O ring changed i presume Check also your cam sensors ...you have 4 on the V8 ..those will generates misfire if you have leaks (creating some ground bad contact) ...although you would get a code for them..i would put fresh plug also.
Ps add your X model, engine in ur signature ...
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2006 X5 4.4i premium, Sport package ,Winter Package, Sat Nav. AFE Power stage II Production : 08-2006
2012 BMW 128I Convertible Black
2011 Mercedes Benz B200 sold
Last edited by Whitecat; 04-15-2014 at 05:55 PM.
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