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Old 07-15-2010, 10:14 PM   #2
The-Traveler
3rd Gear Member
 
Join Date: Dec 2008
Location: GTA
Posts: 368
From what I've read the seals will go on all cars after 20-40 thousand kilometers. You're better off to do it either way and I guarantee you will notice it! I did mine 2 months ago and it was very noticeable.

I don't know what's causing it to be intermittent but if it's not smooth you may want to get a new set of NGK spark plugs. I was using Bosch and they were misfiring so as soon as I put in the NGKs it went away.

From what I've read online bad Cam Position sensors can cause performance losses but I don't know how to diagnose that so you should look it up on e46fanatics.
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