[D27]

It true that once I put jb4 I should change the coil and the spark plug? I have 40mile and I had jb4 for a week already and it was misfire 5,6 so I change just the coil and it run fine both coil 5,6 should I change the rest 1,2,3, and 4 and all spark plug or just wait until they go bad?

[Beemw335]

Originally Posted by D27

It true that once I put jb4 I should change the coil and the spark plug? I have 40mile and I had jb4 for a week already and it was misfire 5,6 so I change just the coil and it run fine both coil 5,6 should I change the rest 1,2,3, and 4 and all spark plug or just wait until they go bad?

40k
Its time to change plugs.

[tmo24]

Originally Posted by D27

It true that once I put jb4 I should change the coil and the spark plug? I have 40mile and I had jb4 for a week already and it was misfire 5,6 so I change just the coil and it run fine both coil 5,6 should I change the rest 1,2,3, and 4 and all spark plug or just wait until they go bad?

I have a headache now. But yes, change all of the spark plugs.

[gzim335]

Originally Posted by D27

It true that once I put jb4 I should change the coil and the spark plug? I have 40mile and I had jb4 for a week already and it was misfire 5,6 so I change just the coil and it run fine both coil 5,6 should I change the rest 1,2,3, and 4 and all spark plug or just wait until they go bad?

change all plugs and change coils as they go

[D27]

Ok thanks you guys I guess I have to change all 6 plugs and 4 coil

[Spun Crankhub]

might as well hop on ebay and just order all 6 coils. If you still get misfire codes could be injector, lpfp, or in my case recently hpfp failure.

[D27]

Originally Posted by MontegoChris

might as well hop on ebay and just order all 6 coils. If you still get misfire codes could be injector, lpfp, or in my case recently hpfp failure.

I change both coil 5, and 6 and it doesn't misfire anymore but I'm gonna change the rest

[shaginwagon13]

If you haven't already bought the coils or for anyone else wanting to buy them on ebay:

http://www.ebay.com/sch/i.html?_nkw=...lugs&_osacat=0

[D27]

It a good price but I get them for 45-40 each from BMW I get %20 off

[Jeff@TopGearSolutions]

You should change all of the plugs if they have over 25K.

The coilpacks can be a bit pricey. Eventually the others may fail but that is up to you if you want to change them or if you are having problems.

[Gugs]

Don't buy coil packs second hand from eBay and such. They have production dates stamped on the coils. Many sellers selling older production coils cheap which are prone to fail.
You want new revisions made within the last two years.

[D27]

Originally Posted by Gugs

Don't buy coil packs second hand from eBay and such. They have production dates stamped on the coils. Many sellers selling older production coils cheap which are prone to fail.
You want new revisions made within the last two years.

I never buy anything from eBay things like that plugs pad etc... I buy them from BMW of manhattan

[ksalih]

Originally Posted by D27

It true that once I put jb4 I should change the coil and the spark plug? I have 40mile and I had jb4 for a week already and it was misfire 5,6 so I change just the coil and it run fine both coil 5,6 should I change the rest 1,2,3, and 4 and all spark plug or just wait until they go bad?

I THINK you are asking if you should replace all plugs at 40k miles. I know you said 40mile, but again i THINK you meant 40k Yes OP, replace plugs. I did right after Jb4 isntall because of missfires. Haven't had a missfire since.