Thread: 06 X3 misfires
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Old 11-13-2012, 05:04 AM
brewder brewder is online now
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Location: Allentown PA Area
 
Join Date: May 2010
Posts: 598
Mein Auto: 2011 328i xDrive
Quote:
Originally Posted by ncord View Post
When I accellerate to merge etc.the engine sounds good till just before it shifts from 3rd to 4th gear (auto trans.).Then it seems to mis fire a bit until it shifts.I put in a bottle of seafoam,and have just replaced the plugs .Plug #2 had oil all over it ,even up the sides of it.
Cleaned up the oil & installed new plug ,but car still misfires with hard accelleration at about 4000 rpm.in 3rd gear.With reving in park or regular accell.it runs good.What could it be???
Car is an 06 3.0 with 86k.miles (car orig.from USA)
My '08 does something similar... It sometimes feels like it "hesitates" but only under heavy acceleration. I'm due for new plugs in roughly 25k miles, but may replace them and the ignition coils much sooner.. Someone also has suggested replacing the O2 sensors, but those are expensive and should last way past 100k miles..

My plan is to keep running Techron through the system every could thousand miles (no seafoam), then replace the plugs..then the coils.
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('11 E92 328i xDrive - Deep Sea Blue - New to Me)
('07 E92 328xi - Space Gray - still in the family)
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