2011 128i, rough idle/shaking cold start, just had plugs changed! help

[Vancity128guy]

Hello all, i have a 2011 128i with 80,000KMs on it, and about a week ago i was on the highway and i noticed my car stuttering under acceleration, and the CEL came on... misfiring so i took it to the dealer and they came back saying misfire on cyl 3 and plugs needed to be replaced.. soooo 700 dollars later (im in canada) they replaced the plugs and one coil pack on cyl 3 and it was fixed and driving fine.. now yesterday i cold start and i am getting a very noticeable shaking/vibrating/clunking and the rpm meter was bouncing up and down.. once it warmed up it seemed to drive fine and smooth out.. same thing happened this morning, so now i have to take it back to the dealer, and they want to charge me another 160 dollar diagnostic fee unless it has something to do with the plugs.. i never had this issue before they replaced the plugs.. any ideas what is going on?

thanks

[Havocsteve]

They only replaced the one coil? Should have done all plugs + coils. Could be the others are now facing the same issue (old, dirty, broken).

You also should have spend the $60 on the BMW spark plug tool, and taken about 1hr to remove everything yourself. Plugs and coils take about 15 minutes if you know what your doing. Only issue would be coding the new coils. Save yourself the labor cost. I bought new plugs from BMW Endras and it cost me $130 rounded up (I'm in Toronto).

[Vancity128guy]

Originally Posted by Havocsteve

They only replaced the one coil? Should have done all plugs + coils. Could be the others are now facing the same issue (old, dirty, broken).

You also should have spend the $60 on the BMW spark plug tool, and taken about 1hr to remove everything yourself. Plugs and coils take about 15 minutes if you know what your doing. Only issue would be coding the new coils. Save yourself the labor cost. I bought new plugs from BMW Endras and it cost me $130 rounded up (I'm in Toronto).

im pretty mechanically un-inclinded so that's why i take it to the shop..

i should also mention im not getting any misfiring or stuttering under load.. its just at the cold start during idle.. and no CEL either

[Havocsteve]

I'm somewhat the same, more so a perfectionist because its mine. Youtube helped me, along with some guidance from the pops.

Honestly, I would have had them all changed. If one goes, the others soon should fallow.

Also, here in Toronto, we have a great german parts source for OE quality stuff.

https://order.germanparts.ca/applications.html

[Vancity128guy]

ok thanks.. i guess this could really be anything? I read on here it could be the injectors as well.

sucks cause my warranty ended a 1.5 months ago

[Vancity128guy]

View My Video

heres a short video of whats happening, sorry for bad quality, almost feels like its on its way to stalling but never goes below 500 rpm

[Vancity128guy]

Here's a much better video of what's happening.. you can tell from the sound of the exhaust near the end.. once it's warm it goes away completely and runs smooth.

If anyone could let me know what it might be I would really appreciate it

[bazil769]

I had the same problem. I found out that more than one of my coils were bad after doing the unplug while car is running test. I changed out all my coils and spark plugs. After the test i pulled out one coil and spark plug took pictures of there make and part number and found them on Amazon. I then looked up a youtube video and replaced them myself.

Here are the spark plugs i bought https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Here are the coils i bought https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

My car runs like a fking Champ now.

[Havocsteve]

That's not injectors. Injectors would give you a long crank turn and engine start (like starting an old car where your turn the key for a few seconds). This has to be coils, without a doubt. Sounds like misfire, in which case you addressed the spark plugs but only 1 coil. Get the other 5 done asap, you won't have this issue.

[jaye944]

I've quickly scanned the replies TBH

so a few points/

* coil packs shoulnd't be changed out willy-nilly nor all out at the same time
there is a way to proove a faulty pack, plug and cable. Generally if multiple coils go which they can it will show up in a scan

* Substituting works, also coil packs can go at random or never, so simply changing everything out is a waste

* A proper scan using Inpa should be used, either a dealer or indy can do this, not cheap but cheaper than not, plus ALL codes can be seen.

* Prior to a dealer doing work, they will still INSIST on pulling the codes themselves, regardless of what you show them

* OBDii readers will not show everything

We really need to see exactly what all the codes (BMW CODES as well) show

It is "possible" that they corrected the fault, or 1 of many faults. which they missed or have only showed up since the repair
since you said it worked fine "until yesterday"

you said
" they replaced the plugs and one coil pack on cyl 3 and it was fixed and driving fine.. now yesterday i cold start "

What was the timing between fix, driving fine and "now yesterday problem" ?

Unless you ask BMW wont give you the codes,
pity your in Van, otherwise I'd be happy to pull your codes

if it's like a 24 hour thing, then the onus is on the dealer, longer and they kinda have you.

Originally Posted by Vancity128guy

Hello all, i have a 2011 128i with 80,000KMs on it, and about a week ago i was on the highway and i noticed my car stuttering under acceleration, and the CEL came on... misfiring so i took it to the dealer and they came back saying misfire on cyl 3 and plugs needed to be replaced.. soooo 700 dollars later (im in canada) they replaced the plugs and one coil pack on cyl 3 and it was fixed and driving fine.. now yesterday i cold start and i am getting a very noticeable shaking/vibrating/clunking and the rpm meter was bouncing up and down.. once it warmed up it seemed to drive fine and smooth out.. same thing happened this morning, so now i have to take it back to the dealer, and they want to charge me another 160 dollar diagnostic fee unless it has something to do with the plugs.. i never had this issue before they replaced the plugs.. any ideas what is going on?

thanks

[NorthernDancer]

Yes, first back to the dealer; they warranty their work.
Second: join BMW Club of British Columbia. A club is full of other members who are always willing to help.

[Vancity128guy]

Ok thanks.. is the car OK to drive like this? Like i said it drives completely normal under accel and once it warms up.. i plan to take it back but im leaving to europe in a week and dont hvae the time nor money at the moment to deal with this... id rather deal with it after my trip.

[NorthernDancer]

I would say that you would be OK.

[Vancity128guy]

Originally Posted by jaye944

I've quickly scanned the replies TBH

so a few points/

* coil packs shoulnd't be changed out willy-nilly nor all out at the same time
there is a way to proove a faulty pack, plug and cable. Generally if multiple coils go which they can it will show up in a scan

* Substituting works, also coil packs can go at random or never, so simply changing everything out is a waste

* A proper scan using Inpa should be used, either a dealer or indy can do this, not cheap but cheaper than not, plus ALL codes can be seen.

* Prior to a dealer doing work, they will still INSIST on pulling the codes themselves, regardless of what you show them

* OBDii readers will not show everything

We really need to see exactly what all the codes (BMW CODES as well) show

It is "possible" that they corrected the fault, or 1 of many faults. which they missed or have only showed up since the repair
since you said it worked fine "until yesterday"

you said
" they replaced the plugs and one coil pack on cyl 3 and it was fixed and driving fine.. now yesterday i cold start "

What was the timing between fix, driving fine and "now yesterday problem" ?

Unless you ask BMW wont give you the codes,
pity your in Van, otherwise I'd be happy to pull your codes

if it's like a 24 hour thing, then the onus is on the dealer, longer and they kinda have you.

I had it in for the service last week, and this week it started doing this weird idle thing.. the dealer siad they did a full inspection and the only cylinder misfiring was #3 which they replaced the coil on..

[NorthernDancer]

You don't care if inspection said only #3 was bad. YOU JUST PAID $700 and it is broken again already. Make sure you talk to the service manager and not just a service advisor. BMW Canada really want you to be happy with their dealer service so hint that you will have to write to them if situation is not resolved quickly and at little cost. Going to Europe for some time? Make sure dealer knows that you'll have to wait until your return and MAKE SURE you get something in writing from them. If fact, get a work order drawn up for a date after your return. In situations like this, GET IT IN WRITING.

[Vancity128guy]

Originally Posted by NorthernDancer

You don't care if inspection said only #3 was bad. YOU JUST PAID $700 and it is broken again already. Make sure you talk to the service manager and not just a service advisor. BMW Canada really want you to be happy with their dealer service so hint that you will have to write to them if situation is not resolved quickly and at little cost. Going to Europe for some time? Make sure dealer knows that you'll have to wait until your return and MAKE SURE you get something in writing from them. If fact, get a work order drawn up for a date after your return. In situations like this, GET IT IN WRITING.

yeah.. ive been tryting to get a service advisor on the phone for the last two days.. they wont call me back its ridiculous.. looks like ill have to go there in person and raise hell.

Dont ever go to Brian Jessel BMW if you're in vancouver.. Nightmare.

[Vancity128guy]

Well what a surprise, driving home from work and my cel comes on again and i am now getting misfire and stuttering all the time.. I'm guess it's another coil since it's the exact same symptoms I had before taking it in...

[desertman123]

Originally Posted by Havocsteve

You also should have spend the $60 on the BMW spark plug tool

N52 doesn't need that, I just used a normal 5/8 spark plug socket and it was fine

[Vancity128guy]

Holy fuck , dealer wants 900 to replace 5 coilpacks.. what the hell!!!!

[mackeroni]

Originally Posted by Vancity128guy

Holy fuck , dealer wants 900 to replace 5 coilpacks.. what the hell!!!!

That's exactly what I said. I bought 6 new coils my 135i for $176USD here...

https://www.oembimmerparts.com/BMW-1...7273ser1kt.htm

Oops. I see a price increase. Now $189USD

Peace... Mack

[Vancity128guy]

well it was another coil gone bad, dealer replaced it free of charge.. i guess i can consider that a win... im just gonna buy a few more bosche coils and get someone to install the rest of them..

[NorthernDancer]

Before you go buy Bosch coils, join BMW Club of BC. That "someone" should be a club member who will help you with everything on your car.