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      12-30-2016, 11:40 AM   #1
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Leaky Fuel Injectors & New Coil Packs

Hello all,

I'm in the middle of trying to get the dealership to cover my leaky injectors at 110K miles. The caveat is that I had the BMW Platinum Warranty through 100K and I reported the issue at 98K but they couldn't replicate (because the car has to sit for a few days to display the problem). Now I have a video of the car taking over one minute to burn off the excess fuel with the engine surging and almost stalling as it does. Also multiple misfire codes.

Now, I had swapped spark plugs but they also wanted me to swap coils before they would cover the injectors (extra fuel in the cylinders obviously isn't from the coil packs...whatever). So I bought these coils from Amazon and replaced all 6.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I expected the car to run better when started up frequently (no extra fuel in the cylinders) but this doesn't appear to be the case. Sometime it takes 3 seconds for the car to fully turn over and start now. And when first starting and idling, you can hear the smallest miss in the engine from time to time like a cylinder isn't firing, you hear the exhaust burp a bit and can feel it. No misfire codes are being thrown now though on idle or while at WOT.

The only explanation I can think of is the coil packs are not all good? I'm getting no codes so can't swap cylinders so I'm really lost as to what to do. Any thoughts?

Thanks!
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      12-30-2016, 04:07 PM   #2
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Take a look, are you covered under SI B010215?
http://www.e90post.com/forums/showthread.php?t=1209808

Its a Limited Warranty Extension just for injectors 10 years/120k miles from in service date.

Take a look here as well:
http://bmw-rp.com/production/isg/bmw...bmw_portal.nsf

But if you no longer throw misfire codes, and no longer have surging, stalling its kinda hard to meet a symptom they can claim. hard start could also be from clogged intake. when was last time the intake was walnut blasted?

Good luck
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Last edited by BruceJ; 12-30-2016 at 04:22 PM.
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      12-30-2016, 04:24 PM   #3
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Make sure your Bosch coils are seated correctly as they tend to push back off due to getting air stuck behind the boot

Video example ( not mine)



Make sure the plugs and coil boots are completely dry of any oil or lubricant before you push them down or they will slowly lose contact with the top of the plug
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      12-30-2016, 04:42 PM   #4
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Take a look at post #9
2010 model year injector recall

Last edited by BruceJ; 12-30-2016 at 04:54 PM.
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      12-30-2016, 06:11 PM   #5
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Are you getting a little vibration under load?
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      12-30-2016, 10:44 PM   #6
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Quote:
Originally Posted by BruceJ View Post
Take a look, are you covered under SI B010215?
http://www.e90post.com/forums/showthread.php?t=1209808

Its a Limited Warranty Extension just for injectors 10 years/120k miles from in service date.

Take a look here as well:
http://bmw-rp.com/production/isg/bmw...bmw_portal.nsf

But if you no longer throw misfire codes, and no longer have surging, stalling its kinda hard to meet a symptom they can claim. hard start could also be from clogged intake. when was last time the intake was walnut blasted?

Good luck
Bruce
Hello, thanks for the information. I see my production date is 4/2009, that bulletin shows cars built from 4/23/2009 and on, but I'm not sure what DAY mine was produced. Regardless, close enough right? Mine is MY 2009 though...Also, the car isn't throwing misfire codes now, but it IS surging and stalling after sitting for a day or two when I start it up. Honestly worse than the video below. Last walnut blast was done about 20,000 Miles ago, so definitely not that.



Quote:
Originally Posted by maxoutput View Post
Make sure your Bosch coils are seated correctly as they tend to push back off due to getting air stuck behind the boot
I have every reason to believe they are seated properly, the went down into the holes all the way and the top closed pretty firmly. So I think they should be mounted properly.

Quote:
Originally Posted by BruceJ View Post
Take a look at post #9
The link doesn't seem to be working...

Quote:
Originally Posted by RSKY65 View Post
Are you getting a little vibration under load?
Not sure on this one, the car feels a bit less stable or something while driving but didn't know why, maybe this is what it is.

Last edited by ef11; 12-30-2016 at 10:52 PM.
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      12-31-2016, 01:22 PM   #7
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I was just going to post i got the letter in the mail! I replace all injectors in october. So ill be getting a refund soon!

Yes rough starts are your injectors. You might notice Hard drag type launches might also throw misfires and CELs or brake boosting from a dig.


Now i think my hpfp is crashing. I dont think this is covered for my 2010.
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      12-31-2016, 03:06 PM   #8
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Quote:
Originally Posted by maxoutput View Post
Make sure your Bosch coils are seated correctly as they tend to push back off due to getting air stuck behind the boot

Video example ( not mine)



Make sure the plugs and coil boots are completely dry of any oil or lubricant before you push them down or they will slowly lose contact with the top of the plug
Sexy time!
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      12-31-2016, 04:28 PM   #9
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Indeed, there is something disturbingly sexual about it. Either that or the coils likes to crap spark plugs.


Quote:
Originally Posted by Miller335 View Post
Sexy time!
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      12-31-2016, 11:54 PM   #10
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Quote:
Originally Posted by Murph335 View Post
I was just going to post i got the letter in the mail! I replace all injectors in october. So ill be getting a refund soon!

Yes rough starts are your injectors. You might notice Hard drag type launches might also throw misfires and CELs or brake boosting from a dig.


Now i think my hpfp is crashing. I dont think this is covered for my 2010.
Nice! Well I will be taking my car into the dealership over the next two weeks to have them really diagnose the problem and hopefully replace the injectors and possibly the HPFP all under warranty.

The fact that I put new coils in and it seems to be running worse and definitely starting up less smoothly is concerning..
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      01-01-2017, 11:44 PM   #11
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I was driving today and after hitting some bumps the car started shaking and check engine light was flashing...the car had trouble starting a couple times and then began to run just fine. Before this issue the car was running fine. So I think the coils might not be seated properly, does this sound right?
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      01-02-2017, 01:40 AM   #12
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I got this letter a few days ago and with my luck, I will hit 120,001 and the injectors will give out
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      01-02-2017, 02:24 AM   #13
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the coils i bought on amazon didn't work,the car barely started(sent them back), bought oem from dealer it ran fine(n55). From what i can tell,these cars came with a couple of different sized plugs, i think that was the problem with the amazon coils,they didn't fit correctly.
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      01-02-2017, 12:13 PM   #14
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So it seems multiple people are getting this letter now, since I reported my issue while still under the BMW Platinum warranty hopefully I don't need the letter and they will just fix it.

The coil part number matches what I was ordering from other sites and on Bosch website it says they are the correct ones for my car, exact same size as the ones I pulled out...
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      01-02-2017, 12:28 PM   #15
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I'm running the same design Bosch coils I.e they sit on top of the spark plug contact pinrather than clip down on it. When I first installed them the car didn't start, I reseated them and it started but misfired.
I cleaned the inside of the coil boot and plug ceramics with circuit board cleaner so the boots gripped the plug better and she finally ran cleanly. Many peeps use dielectric grease on their coils, if you try it with this design they will never seat.

My plugs are Ngk with a smooth ceramic , I'm starting to think these coils are more designed for plugs with rings in the ceramic to hold them in place.
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      01-02-2017, 11:11 PM   #16
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I believe these Bosch ones I replaced are OEM replacements though? The top piece didn't click all the way down over the wiring harness but it seemed to be installed plenty firmly over the plug. This car is just pissing me off at this point, shouldn't be hard to buy OEM coils and swap them out and have them perform correctly.
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      01-03-2017, 10:58 PM   #17
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So I pulled everything apart today and really insured the coil packs were on securely. I twisted them and slowly slid them over the plugs and they were extremely snug, and the electrical connector fully goes in and the top plastic piece clicks in place.

I test drove the car very hard and it ran ok with no misfires, but at idle I can still hear the exhaust missing every 30 seconds or so it just isn't completely smooth. So I guess these new Bosch coils aren't working properly, seems weird.

Below is cylinder 3 and 4 before reinstalling, they look the same before and after though, but were misfiring before.

The last pic is the new coil (bottom) and old coil (top) with the box from the new ones, I replaced all 6.





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      01-04-2017, 09:52 AM   #18
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It's not the coil connectors that tend to be the problem , it's the way the coils sit on the spark plug. Delphi etc clip onto the top of the spark plug and hold tight, the Bosch new style have a small spring inside that literally pushes against the top of the spark plug as you push the coils down. If the coil starts to push up due to not gripping the plug or air getting trapped as in the video I posted or the spring is damaged the coil will lose contact with the plug and the engine will miss.

If the coils stayed down and didn't push back up they should be ok
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      01-04-2017, 10:42 AM   #19
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Quote:
Originally Posted by maxoutput View Post
It's not the coil connectors that tend to be the problem , it's the way the coils sit on the spark plug. Delphi etc clip onto the top of the spark plug and hold tight, the Bosch new style have a small spring inside that literally pushes against the top of the spark plug as you push the coils down. If the coil starts to push up due to not gripping the plug or air getting trapped as in the video I posted or the spring is damaged the coil will lose contact with the plug and the engine will miss.

If the coils stayed down and didn't push back up they should be ok
Thanks for the info, I understood this from your video as well that's why I made sure I wiggled them down and really pushed them down as absolutely far as they would go. I let them sit for 5 minutes and checked them again and they were in the same position, I pushed them down more and more just to ensure and they are snuggly on there. So the plugs are installed as well as they can be, I am sure.

I think my best bet is to return them and order the Delphi ones. Looks like Amazon has them for only $29, not bad at all.

https://www.amazon.com/Delphi-GN1032.../dp/B00CJFLOJU
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