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      07-23-2015, 05:40 PM   #3
alex-qts
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Drives: E92 335i N54 Coupe
Join Date: Jul 2014
Location: SE England

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Quote:
Originally Posted by 335NJ View Post
First off, how old are the spark plugs? If they're more than 25k miles old, swap them with new.

Next, have you confirmed there's no vacuum leaks by replacing/checking all of the vacuum lines?

Last, bone stock with a tune like MHD has to offer, you should really upgrade your charge pipe before it breaks.
I have just checked the service book and the plugs are almost 25K to the day! Guess it is time to swap them out.

Vacuum lines I have not checked or replaced but will get on that also.

Will look into charge pipes, is this the famous pipe that will go bang at some stage if it is not changed?!

cheers
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