I just went around in a circle with this application on a routine spark plug replacement. Changed all 6 using BMW plugs, torqued to spec, no lube on threads and I played hell with continuous misfires. Saw where you could run it with MAF sensor disconnected and then hook it up and it would have no more issues. That did not really happen. I ended up putting three of the old plugs back in and then got the misfires to a low enough count to keep from throwing code. Surely these are not set up to be "indexed" are they? Has anyone ever gone to a multi electrode plug to resolve this issue?
tia

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Jim

I realize that you indicated that the plugs were BMW plugs, but were the new plugs the same brand and model as the original plugs? Did you verify that the gaps were to spec? Did you move the coils around to see if the identity of the misfiring cylinders was affected?

If that is an inline 6 coil over plug they have plenty of coil failures, if it is a SULEV model the coils may be covered up to 150K.

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

Yep BMW plugs with same numbers/info and swapped coils and plugs numerous times. Now with three of the old plugs in 1, 2 and 6 it only throws a code for misfire at runs to 110 mph. That's one way to slow em down.

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Jim

Problem with voltage to the coils?

IDK, customer has had no more issues since yesterday so we'll see. I did find out that there is no special setting change after replacing them. I am going to try three different new ones.

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Jim

did you clean the threads in the cylinder before screwing the plugs in? - they get caked in soot and sometimes even cause exhaust leaks as the plugs will torque up but wont seal. You may have had bad spark plugs too if they were following the cylinder misfire.

Does this generation X6 also suffer from the rain tray water drip on the MAF sensor and also cyl5?

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I did not clean the spark plug threads in the head so that may very well be the issue. I've returned the three worthless plugs to BMW and have received three new plugs to try next time car is in. I'll make sure I clean the threads up.

It looks like they have redesigned the drainage tray at the windshield wiper to keep water off of the last couple of cylinders. Looks like a good design but it looks like it is still that BMW worthless plastic type material that will fall apart after a few years.

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Jim

I have found that usual butyl tape works great to seal the rain trays there. The new design with the huge rubber gaskets is nice and apparently has more fiber in the resin mix, but it will fail eventually.

I also sealed my E70 rear inboard tail lamps with butyl tape as the foam tape that BMW used doesnt work. butyl tape with some heat from a hair dryer and its good as gold.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I'll have to check that out. The owner had used FlexTape - wow was that stuff hard to remove. Only thing I had was aluminized duct tape so that is what I used. You would think BMW and MB would get the Japanese or one of the US companies to help with designing plastic parts.

Thanks for heads up.

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Jim