Quote:
Originally Posted by dbensman1
Well, first tons of thanks to AWD Addict for starting this thread. I spent 4 days and 18 clumps of hair sorting through all 17 pages +.
So, yeah, after exactly the same situation many of you described in detail, I figured mine out.
Flipping through the Bavarian Auto catalog is what got me into this whole mess in the first place. My just 47k 2010 335xi had absolutely no tuning or performance problems. The only mod on it is a K&N cold air intake. But seeing their ‘high performance’ ignition coils on sale, and having done them before on an e39, I pulled the trigger on coils and spark plus, just for giggles. It’s been a shit show since.
First, I checked all connections and re-tightened everything. Checked for any cracked hoses and vacuum leaks. Using an old (stock) ignition coil, I pulled each new ignition coil, in sequence, to check if I had any duds in the new batch. I removed and cleaned both the MAF and TMAP. What finally worked?
I re-installed the old sparkplugs. That was it. I cleaned them and simply swapped the OEM plugs back. Everything back to smooth, steady, silky idle.
The Bosch plugs I purchased were from Amazon. Guess I should have read the negative reviews more closely. I ensure you they were the correct spec. Maybe there are widespread fakes out there, or a huge batch of defective plugs that came off the line? I don’t know. Of course, it’s possible that the ignition system on these cars is so touchy, that new plugs simply jar the thing out of whack. Possible. What I DO know, however, is that I’m going to sell this car before the plugs die. Ugh.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 |
Well, dan ;-), sorry you had bad luck. There are blue ring and green ring bosch plugs. it looks like the one realoem shows for mine is a green.
http://www.realoem.com/bmw/enUS/part...&q=12120037244
I got a set of blue rings in a bag and was gonna swap them out in the next few K. Iv bought at least 3 previous sets off of ebay (blues i think) with no prob. shrug..