[iqraceworks]

Haha! Congratulations....you won the internet today.

[Antetokounmpo]

Replace all 6 coils and plugs, your car will run so much better for years. Ask me know I know. I went YEARS having a misfire every few months, after doing all 6 plugs and coils at once I haven't had a misfire in a few years.

[iqraceworks]

Originally Posted by Antetokounmpo

Replace all 6 coils and plugs, your car will run so much better for years. Ask me know I know. I went YEARS having a misfire every few months, after doing all 6 plugs and coils at once I haven't had a misfire in a few years.

Yep.....good advice. Just replace them...be done with it.

[uncle don]

after this weekend replacing all I will report back and see if after spirited driving it is fixed...... I know several of us hijacked the OP sorry about that but this is all related to your issue....and several of us have the same thing going on.

[relative4]

Originally Posted by Antetokounmpo

Replace all 6 coils and plugs, your car will run so much better for years. Ask me know I know. I went YEARS having a misfire every few months, after doing all 6 plugs and coils at once I haven't had a misfire in a few years.

So... you replaced a set of degraded plugs, and thus you came to the conclusion that replacing a set of perfectly good coils was the answer?

Look guys, you are 100% entitled to waste your own money, but when you take your mistakes as license to hand out bad advice to others, you do disservice to the community.

[Soden82]

I had a misfire in cylinder 1 after an MHD flash so I went and replaced all the coils and plugs at the same time. Figured I'd rather take the plastics off once and do it all instead of doing one plug and coil and then having to do it again at a later point

[MLars]

Originally Posted by jpauten

How new are your injectors? This exact same thing just happened to me, I did everything you did, and it turned out to be my injector.

Funny this is happening to you guys too. When I first got my car I got a misfire on cyl 3, replaced all plugs and coils for piece of mind. A couple days later it threw a cyl 6 misfire code. My car has index 12 injectors but not sure when they were replaced. I haven't been able to replicate the misfire because I'm having a boost leak issue at the moment.

[iqraceworks]

Originally Posted by relative4

So... you replaced a set of degraded plugs, and thus you came to the conclusion that replacing a set of perfectly good coils was the answer?

Look guys, you are 100% entitled to waste your own money, but when you take your mistakes as license to hand out bad advice to others, you do disservice to the community.

Maybe you don't understand the "time is money" aspect of this.

If you are going to change your plugs, and you already have a set of super old high mileage coils (that are possibly acting up already), and you are already going to have to pull the coils to get the new plugs in......why not spend a little money, and put all new coils back in?

Or...you could do the plugs, put the old coils back in that might be already giving you problems currently. Spend time swapping coils around doing troubleshooting....etc, etc, etc.....

I'll spend $150 to save me a few hours of jacking around with the car, and all but eliminate the change of one acting up on me and/or failing.

Your logic does not make any sense.

It's called preventative maintenance for a reason.......damn, you must be one cheap bastard.....

[Antetokounmpo]

Originally Posted by relative4

So... you replaced a set of degraded plugs, and thus you came to the conclusion that replacing a set of perfectly good coils was the answer?

Look guys, you are 100% entitled to waste your own money, but when you take your mistakes as license to hand out bad advice to others, you do disservice to the community.

Nope. They were not perfectly good coils, where did I say that? If they were perfectly good the car wouldn't have a new misfire every few months. Sure, I replaced some that were okay but they would've needed replacing sooner rather than later at the rate they were going. It's cheap to replace them, why not just do it and be set for a few years instead of chasing misfires every few months? My time is much more valuable than that.

[Antetokounmpo]

Originally Posted by iqraceworks

Maybe you don't understand the "time is money" aspect of this.

If you are going to change your plugs, and you already have a set of super old high mileage coils (that are possibly acting up already), and you are already going to have to pull the coils to get the new plugs in......why not spend a little money, and put all new coils back in?

Or...you could do the plugs, put the old coils back in that might be already giving you problems currently. Spend time swapping coils around doing troubleshooting....etc, etc, etc.....

I'll spend $150 to save me a few hours of jacking around with the car, and all but eliminate the change of one acting up on me and/or failing.

Your logic does not make any sense.

It's called preventative maintenance for a reason.......damn, you must be one cheap bastard.....

My thoughts exactly. Do it once every few years rather than chasing something new every few months. Time is money like you said. My time is better spent doing other things.

[iqraceworks]

Originally Posted by Antetokounmpo

Nope. They were not perfectly good coils, where did I say that? If they were perfectly good the car wouldn't have a new misfire every few months. Sure, I replaced some that were okay but they would've needed replacing sooner rather than later at the rate they were going. It's cheap to replace them, why not just do it and be set for a few years instead of chasing misfires every few months? My time is much more valuable than that.

Bingo.....

[uncle don]

I replaced my plugs and coils this weekend and seemed to take care of most my issues...drives pretty sweet now.

[Unknown_Car]

Originally Posted by relative4

After that doesn't fix the problem, what random parts are you going to advocate wasting money on next?

Lol you make me laugh. That's why your car is sitting in the shop getting fixed every week because you can't pay 150 for all 6 coils? So you keep replacing 1 every week?

OP don't listen to this nonsense, do it once and do it right don't play round. They need to be replaced.

[blown07]

Ya I learned this lesson a few years back that coils do go weak on these cars. You would think either they work or they don't. On a non boosted or stock boost car the original coils may last the life of the car but throw double factory boost at them and intermittent misfires start to show up. I changed them 2 years ago (plugs and coils) and no misfires even at 23psi.

[iqraceworks]

I haven't seen any posts from relative4 in a while....he's probably busy spending hours in his garage swapping coils and trying to figure out which spark plug is bad.....

[blown07]

Originally Posted by iqraceworks

I haven't seen any posts from relative4 in a while....he's probably busy spending hours in his garage swapping coils and trying to figure out which spark plug is bad.....

Well it's a relatively easy job and a relatively small amount of money...

[iqraceworks]

Originally Posted by blown07

Well it's a relatively easy job and a relatively small amount of money...

My point exactly.......

[uncle don]

ok back to original poster and question...I replaced my plugs and coils. made the misfires go away and runs better but still surges and hesitates some in 1-2 gears and then clears out thru mid range on thru the gears..pulls really hard. but low end its like something is holding it back? suffocating it? but no lights or anything are on...what next? besides doing a walnut blast...because that seems to be thru all gears and all rpm's not just low rpms and gears like mine... and neither does fuel pump. could it be trans? exhaust? restrictive air filter? all is still OEM factory under hood....

[uncle don]

this is what my plugs looked like....33k miles when I pulled them.

[matamua]

Originally Posted by uncle don

ok back to original poster and question...I replaced my plugs and coils. made the misfires go away and runs better but still surges and hesitates some in 1-2 gears and then clears out thru mid range on thru the gears..pulls really hard. but low end its like something is holding it back? suffocating it? but no lights or anything are on...what next? besides doing a walnut blast...because that seems to be thru all gears and all rpm's not just low rpms and gears like mine... and neither does fuel pump. could it be trans? exhaust? restrictive air filter? all is still OEM factory under hood....

You indicated you asked a local indy shop about the walnut blast. Is it a BMW shop? Do they even work on N54s? It's one of the first/most common maintenance things people do when trouble shooting this, ESPECIALLY if you're getting ready to tune.

It could be a lot of different things. Plugs, coils, walnut blast are a good place to start. I know you replaced the plugs and coils—did that make your codes go away?

[uncle don]

yes, codes went away and now runs pretty strong but mostly in manual mode taking off in m1 etc... see this post: https://www.e90post.com/forums/showthread.php?t=1671488
for my other issue now....

[Serf27]

It takes all of 5 minutes to replace the 6 coils in my n54, even less if I just replace 1.