View Single Post
      10-02-2012, 05:31 PM   #14
Lieutenant Colonel

Drives: Black BMW 335i coupe
Join Date: Mar 2007
Location: USA

iTrader: (0)

Originally Posted by Verbatim View Post
I think the rare misfires could have been caused by my spark plugs... 47k miles and i haven't changed them yet
From my experience, this is the differences I've seen in misfires caused by different components (don't take this as the gospel, just some tendencies I've seen):

1. If you lug your engine in 3rd and the misfires happen right away, it was usually a bad coil.

2. If you lug your engine in 3rd and the misfires happen after being in WOT for a little bit after full boost, then it was usually a bad injector (majority of the causes for my misfires).

3. If the car only misfires at really high rpm when going WOT, then it was the spark plugs. (rarely ever was the case).
Legal Disclaimer: Anything I or anyone else says about my vehicle on this website( or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.