How to diagnose injector failure

NickBlaine · 10-16-2014, 07:17 PM

My 335 started throwing codes about 3 weeks ago. Misfire on all cylinders but one.

I don't know what was previously done, but with 55k miles, I went ahead and replaced coils and plugs. I have attempted to clear codes with the JB4, but the CE light is still there. The only other thing I can think of is injectors, but didn't know if there was a way to diagnose this easily or not.

I have the Maxcare warranty, but I want to make sure there isn't something missing before I have to remove the jb4, and take the car in.

Thanks

mojobmw_e90 · 10-16-2014, 07:55 PM

at this point it would be wise to replaced all 6 injectors. do you have any other codes other than misfire on 5 cylinders?

JOHNNY-5 · 10-16-2014, 08:48 PM

May not be same as you but my car threw multiple misfires and i did everything people recomended and still misfire. Finally gave up and took to dealer. They diagnosed it and replaced TMAP and all is well.

Maybe try replacing that as it is cheaper than 6 new injectors.

NickBlaine · 10-17-2014, 08:51 AM

Thanks for the feedback. Still looking to see if there is a way to easily diagnose this. I have an aftermarket warranty, so looks like it will just be going in for service. I just thought this topic might help others out as well.

bigdaddycane · 10-17-2014, 09:06 AM

what code(s) is still showing up now?

NickBlaine · 10-17-2014, 09:15 AM

I'm at work, so I will have to check again when I get home. But it is still showing misfires on 5 cylinders.

I drove around for a bit after changing the plugs/coils, cleared the codes with the JB4, drove around some more. Service Engine light never went off.

It's fine cruising around, but if I go WOT it's choppy/chugging. Hard to explain, but almost a very quick pulsating.

bigdaddycane · 10-17-2014, 09:18 AM

Post the code(s) when you get a chance

Welterweight · 10-17-2014, 09:41 AM

Sounds to me like injectors. I also replaced plugs and coils soon after I tuned the car. About a month later I got the exact same thing happening with my car. I installed 6 new injectors with 13 index and Idle is much improved, however I am not able to go WOT as they are not coded yet.

Good luck man

Myrder · 10-17-2014, 10:34 AM

Its a few injectors going bad, do you have a rougher idle on a cold start? That's a common sign, or when you changed your plugs were any wet?

NickBlaine · 10-17-2014, 11:12 AM

Quote:

Originally Posted by Myrder

Its a few injectors going bad, do you have a rougher idle on a cold start? That's a common sign, or when you changed your plugs were any wet?

When I first start the RPM's oscillate, but after about 30 seconds or so it clears up.

None of the plugs were wet, and all looked pretty similar.

Raman335i · 10-17-2014, 11:52 AM

Quote:

Originally Posted by NickBlaine

When I first start the RPM's oscillate, but after about 30 seconds or so it clears up.

None of the plugs were wet, and all looked pretty similar.

Sounds like injectors, I had the jumping RPMs at start as well. Replacing injectors fixed it.

Welterweight · 10-17-2014, 11:57 AM

Has anyone experienced the car sputtering/chugging at hwy speeds in 5th? Auto

bigdaddycane · 10-17-2014, 01:08 PM

I have a bad injector and do not have symptoms like these (and every car is different). Maybe multiple injectors could cause this, but I was also thinking about the HPFP. Have you had yours replaced at any point or issues with it before?

NickBlaine · 10-17-2014, 02:24 PM

HPFP just replaced about 4 months ago.

boostE92d · 10-17-2014, 09:31 PM

I had just one injector fail and the car couldn't be driven, it idled like a two stroke and gas was dumping out of the tail pipe. You could have injectors on the way out, you will know when they actually fail. Maxcare only fixed things AFTER they broke on my Audi. You should be fine though.

NickBlaine · 10-25-2014, 05:27 PM

For some reason, I can't get the JB4 to connect to my laptop. So, I took a video of the JB4 readout.

Help is appreciated!

link:

batman_e92 · 10-25-2014, 08:44 PM

When my injector went I had missifire in cyl 6 ... I replaced injctor 5 with 6 and the missfire moved to 5 ..I only replaced 3 not all 6.

You may want to remove the jb4 any way no one wanted to touch my car when I took it in they all said they could not read the codes etc

NickBlaine · 10-26-2014, 08:53 AM

29D2 Misfirings, cylinder 6
29CE Misfirings, cylinder 2
2AAF Fuel pump, plausibility

NickBlaine · 10-27-2014, 08:23 PM

Well something weird happened.... the SEL wasn't on this morning when I started the car. Made some WOT pulls, everything felt pretty smooth. Decided to take some logs, so if anyone can take a look at them, make sure everything looks OK..

10-16-2014, 07:17 PM	#1
NickBlaine First Lieutenant 63 Rep 298 Posts Drives: '10 335XI Join Date: Dec 2013 Location: Indiana iTrader: (0)	How to diagnose injector failure My 335 started throwing codes about 3 weeks ago. Misfire on all cylinders but one. I don't know what was previously done, but with 55k miles, I went ahead and replaced coils and plugs. I have attempted to clear codes with the JB4, but the CE light is still there. The only other thing I can think of is injectors, but didn't know if there was a way to diagnose this easily or not. I have the Maxcare warranty, but I want to make sure there isn't something missing before I have to remove the jb4, and take the car in. Thanks
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10-16-2014, 07:55 PM	#2
mojobmw_e90 Major 380 Rep 1,496 Posts Drives: 2014 E63S Join Date: Oct 2014 Location: Chicago IL iTrader: (3)	at this point it would be wise to replaced all 6 injectors. do you have any other codes other than misfire on 5 cylinders?
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10-16-2014, 08:48 PM	#3
JOHNNY-5 Lieutenant 49 Rep 537 Posts Drives: 2011 E90 M3 6MT ZCP Join Date: Nov 2013 Location: Portland, Ory-Gun iTrader: (8)	May not be same as you but my car threw multiple misfires and i did everything people recomended and still misfire. Finally gave up and took to dealer. They diagnosed it and replaced TMAP and all is well. Maybe try replacing that as it is cheaper than 6 new injectors.
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10-17-2014, 08:51 AM	#4
NickBlaine First Lieutenant 63 Rep 298 Posts Drives: '10 335XI Join Date: Dec 2013 Location: Indiana iTrader: (0)	Thanks for the feedback. Still looking to see if there is a way to easily diagnose this. I have an aftermarket warranty, so looks like it will just be going in for service. I just thought this topic might help others out as well.
	Appreciate 0 Quote

10-17-2014, 09:06 AM	#5
bigdaddycane I even mod my cereal 245 Rep 3,441 Posts Drives: 11 ZCP DCT M3 14 328d 21 GT4 Join Date: Aug 2009 Location: Northern Va iTrader: (53) Garage List 2021 Porsche GT4 [0.00] 2014 BMW 328d Xdriv ... [0.00] 2011 BMW M3 [0.00]	what code(s) is still showing up now? __________________ 2011 Mineral White M3 ZCP - Opticoat, Ventureshield, some CF, B&B exhaust, AFE Intake Vorsteiner VFF 101s Ohlins 2014 Mineral White 328d Xdrive Wagon - Opticoat, Ventureshield, B8s, H&R, Apex SM-10s Hawk Pads 2021 718 Cayman GT4 - Fire extinguiser
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10-17-2014, 09:15 AM	#6
NickBlaine First Lieutenant 63 Rep 298 Posts Drives: '10 335XI Join Date: Dec 2013 Location: Indiana iTrader: (0)	I'm at work, so I will have to check again when I get home. But it is still showing misfires on 5 cylinders. I drove around for a bit after changing the plugs/coils, cleared the codes with the JB4, drove around some more. Service Engine light never went off. It's fine cruising around, but if I go WOT it's choppy/chugging. Hard to explain, but almost a very quick pulsating.
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10-17-2014, 09:18 AM	#7
bigdaddycane I even mod my cereal 245 Rep 3,441 Posts Drives: 11 ZCP DCT M3 14 328d 21 GT4 Join Date: Aug 2009 Location: Northern Va iTrader: (53) Garage List 2021 Porsche GT4 [0.00] 2014 BMW 328d Xdriv ... [0.00] 2011 BMW M3 [0.00]	Post the code(s) when you get a chance __________________ 2011 Mineral White M3 ZCP - Opticoat, Ventureshield, some CF, B&B exhaust, AFE Intake Vorsteiner VFF 101s Ohlins 2014 Mineral White 328d Xdrive Wagon - Opticoat, Ventureshield, B8s, H&R, Apex SM-10s Hawk Pads 2021 718 Cayman GT4 - Fire extinguiser
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10-17-2014, 09:41 AM	#8
Welterweight Major 98 Rep 1,321 Posts Drives: Truck in snow, coupe in summer Join Date: Jan 2013 Location: Boston iTrader: (3) Garage List 2012 BMW 328i [0.00] 2005 Dodge Ram Quad ... [0.00] 2009 BMW 335xi E92 [10.00]	Sounds to me like injectors. I also replaced plugs and coils soon after I tuned the car. About a month later I got the exact same thing happening with my car. I installed 6 new injectors with 13 index and Idle is much improved, however I am not able to go WOT as they are not coded yet. Good luck man __________________ 2009 BSM E92 335xi - RR600's/FBO-VRSF/Apex Arc 8/Wedge E60 MHD/Fuel it Stage 2/BMW PE w/ Dimisa Tips/Alpina TCU/Dinan Springs/RB Inlets/3.5 Bar TMAP
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10-17-2014, 10:34 AM	#9
Myrder Major 162 Rep 1,264 Posts Drives: 2010 E92 335i MSport 6MT LMB Join Date: Apr 2013 Location: WildWest iTrader: (1)	Its a few injectors going bad, do you have a rougher idle on a cold start? That's a common sign, or when you changed your plugs were any wet? __________________ 2010\|335i\|LMB\|E92\|6MT\|MSport\|Logic7\|335is Clutch\|AE Performance\|BMS\|Walbro\|VRSF 7"\| 149.7mph NFZ AZ 1/2mi 1992\|Pontiac Firebird\|Mild 355ci\|T56\| -I will look on your treasures, gypsy. Is this understood?-
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10-17-2014, 11:57 AM	#12
Welterweight Major 98 Rep 1,321 Posts Drives: Truck in snow, coupe in summer Join Date: Jan 2013 Location: Boston iTrader: (3) Garage List 2012 BMW 328i [0.00] 2005 Dodge Ram Quad ... [0.00] 2009 BMW 335xi E92 [10.00]	Has anyone experienced the car sputtering/chugging at hwy speeds in 5th? Auto
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10-17-2014, 01:08 PM	#13
bigdaddycane I even mod my cereal 245 Rep 3,441 Posts Drives: 11 ZCP DCT M3 14 328d 21 GT4 Join Date: Aug 2009 Location: Northern Va iTrader: (53) Garage List 2021 Porsche GT4 [0.00] 2014 BMW 328d Xdriv ... [0.00] 2011 BMW M3 [0.00]	I have a bad injector and do not have symptoms like these (and every car is different). Maybe multiple injectors could cause this, but I was also thinking about the HPFP. Have you had yours replaced at any point or issues with it before? __________________ 2011 Mineral White M3 ZCP - Opticoat, Ventureshield, some CF, B&B exhaust, AFE Intake Vorsteiner VFF 101s Ohlins 2014 Mineral White 328d Xdrive Wagon - Opticoat, Ventureshield, B8s, H&R, Apex SM-10s Hawk Pads 2021 718 Cayman GT4 - Fire extinguiser
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10-17-2014, 02:24 PM	#14
NickBlaine First Lieutenant 63 Rep 298 Posts Drives: '10 335XI Join Date: Dec 2013 Location: Indiana iTrader: (0)	HPFP just replaced about 4 months ago.
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10-17-2014, 09:31 PM	#15
boostE92d Private First Class 61 Rep 174 Posts Drives: 12' 335is Join Date: Jul 2012 Location: Houston,TX iTrader: (0)	I had just one injector fail and the car couldn't be driven, it idled like a two stroke and gas was dumping out of the tail pipe. You could have injectors on the way out, you will know when they actually fail. Maxcare only fixed things AFTER they broke on my Audi. You should be fine though.
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10-25-2014, 05:27 PM	#16
NickBlaine First Lieutenant 63 Rep 298 Posts Drives: '10 335XI Join Date: Dec 2013 Location: Indiana iTrader: (0)	For some reason, I can't get the JB4 to connect to my laptop. So, I took a video of the JB4 readout. Help is appreciated! link:
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10-25-2014, 08:44 PM	#17
batman_e92 Second Lieutenant 21 Rep 268 Posts Drives: 2007 335i Convertable Join Date: Oct 2013 Location: Ottawa, On iTrader: (1)	When my injector went I had missifire in cyl 6 ... I replaced injctor 5 with 6 and the missfire moved to 5 ..I only replaced 3 not all 6. You may want to remove the jb4 any way no one wanted to touch my car when I took it in they all said they could not read the codes etc
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10-26-2014, 08:53 AM	#18
NickBlaine First Lieutenant 63 Rep 298 Posts Drives: '10 335XI Join Date: Dec 2013 Location: Indiana iTrader: (0)	29D2 Misfirings, cylinder 6 29CE Misfirings, cylinder 2 2AAF Fuel pump, plausibility
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10-27-2014, 08:23 PM	#19
NickBlaine First Lieutenant 63 Rep 298 Posts Drives: '10 335XI Join Date: Dec 2013 Location: Indiana iTrader: (0)	Well something weird happened.... the SEL wasn't on this morning when I started the car. Made some WOT pulls, everything felt pretty smooth. Decided to take some logs, so if anyone can take a look at them, make sure everything looks OK.. Attached Images
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