335i Still Misfiring after Injector change!!

tysnappy · 03-25-2015, 05:40 PM

Ps car has run fine all day today no misfiring...
Tomorrow will be the test... Long motorway journey

BashShah · 03-25-2015, 10:13 PM

Quote:

Originally Posted by tysnappy

Hi Guys

Just had cylinder 1 injector replaced because of misfire and also had all coils and sparks replaced 2 weeks previous.

Can I just move injectors around? I was under the impression you had to code them? And also re-prepare them once youve taken them out.

Car is 100% stock not sure what brand plugs my indi used but hes a bmw specialist so guessing he would have used a reputable brand.

Do you think it could still be coils or sparks even if theyre almost brand new?

Cheers
Tom

Ask your specialist he he codedr injectors.
Ask him how did he code it?
Ask him on the brands he used.... you have the right to know what he used in your car.

DN

tysnappy · 03-30-2015, 10:21 AM

So car misfired yday again went into limp mode on motorway... I was convinced that the misfire only really occurs when WOT (as it always seems to happen on the motorways when gunning it down the slip road to join the motorway), and if it drive the car nice and dont push it too much I never seem to get the misfire.

Anyway out of interest I swapped the misfiring cylinders coilpack to another one so I could recheck my diagnostics to see if it followed the pack. Anyway I did that yday took the car for a long hard ride and it didn't misfire. Also driven loads today, driving the car differently and mixing it up to see if it could get it to misfire and its not done since.

Maybe I was wrong and It wasn't occurring during WOT, and it was just random.

if it was a faulty injector, wouldn't you expect it to be misfiring quite often.

Phil325i · 03-30-2015, 10:52 AM

Maybe one of the coils you swapped wasn't seated properly...

BashShah · 03-30-2015, 11:18 AM

Quote:

Originally Posted by Phil325i

Maybe one of the coils you swapped wasn't seated properly...

1+ on above.
Just keep an eye on it.

DN

tysnappy · 03-30-2015, 12:09 PM

Cheers guys, ill keep an eye on it!

Jesus, ive turned into a hypochondriac since getting this car haha!

BashShah · 03-30-2015, 01:21 PM

Quote:

Originally Posted by tysnappy

Cheers guys, ill keep an eye on it!

Jesus, ive turned into a hypochondriac since getting this car haha!

We have all been there and that's how I learned.

DN

David1 · 04-09-2015, 11:50 AM

You can't just move an injector. Both injectors would need to be coded to the new location and you ruin the seal when you move them around. You need to find a new shop.

Jbw.N54 · 01-26-2019, 09:27 AM

Hey guys I have an 07 335i stage 2 plus MHD
I've changed all coils with bosh and plugs with bosh
Changed all injectors index 11 and coded them
Every time I start my car when it's cold (cold start) it will rev up like it should when cold then drops to normal idle but begins to misfire and shake keeps saying cylinder 4. Once o clear it and drive it. It doesn't misfire I can floor it on all 16psi of boost and car has no problem no stutters or anything. But once I slow down to a stop and it idles it idles rough but not enough to say misfire it will only misfire on a cold start. If it's warm at all it just shakes a little like a misfire but won't throw a code. Anyone have any idea. I assume it could be my DME but I haven't done a compression check yet. Also car just pops when I let off gas it dumps fuel and runs really rich but I don't have any cats all I have is a resonator. Please help if you know . Once again
Changed plugs
Changed coils
Changed injectors
All new and coded
Changed hpfp
Changed lpfp
No leaks or wet plugs anywhere
Car has 192k miles
Walnut blasted it already
Has hard charge pipe and bov

arkie6 · 01-26-2019, 12:06 PM

Where did you get index 11 injectors? Are they new or what? Could injector #4 be leaking and causing the mis-fire and rich condition? You say no wet plugs, but have you shut the engine down when it is misfiring and then pulled plug #4 to check the condition of the electrodes?

To rule out a faulty spark plug or coil (even new ones can fail), I would swap coil #4 with coil #1 and see if the mis-fire codes moves to #1 or stays with #4. If the mis-fire stays at #4, then I would swap spark plugs between #1 and #4. If the mis-fire code stays with #4, then it is likely injector related. Now swap injector #1 and #4 and see if the mis-fire code stays with #4 or moves to #1.

Mircea · 02-22-2019, 10:22 AM

Quote:

Originally Posted by Jbw.N54

Hey guys I have an 07 335i stage 2 plus MHD
I've changed all coils with bosh and plugs with bosh
Changed all injectors index 11 and coded them
Every time I start my car when it's cold (cold start) it will rev up like it should when cold then drops to normal idle but begins to misfire and shake keeps saying cylinder 4. Once o clear it and drive it. It doesn't misfire I can floor it on all 16psi of boost and car has no problem no stutters or anything. But once I slow down to a stop and it idles it idles rough but not enough to say misfire it will only misfire on a cold start. If it's warm at all it just shakes a little like a misfire but won't throw a code. Anyone have any idea. I assume it could be my DME but I haven't done a compression check yet. Also car just pops when I let off gas it dumps fuel and runs really rich but I don't have any cats all I have is a resonator. Please help if you know . Once again
Changed plugs
Changed coils
Changed injectors
All new and coded
Changed hpfp
Changed lpfp
No leaks or wet plugs anywhere
Car has 192k miles
Walnut blasted it already
Has hard charge pipe and bov

Only things left for you to try are battery, CCV, solenoids, O2 and NOx sensors from what I can tell

I have the same issue as you, replaced VCG, coils, plugs and now I'll replace all 6 injectors with brand new 11s tomorrow. Fingers crossed.

EDIT: Forgot to update but replacing all 6 injectors completely fixed my issues

03-25-2015, 05:40 PM	#23
tysnappy Enlisted Member 6 Rep 43 Posts Drives: 335i Join Date: Mar 2015 Location: UK iTrader: (0)	Ps car has run fine all day today no misfiring... Tomorrow will be the test... Long motorway journey
	Appreciate 0 Quote

03-30-2015, 10:21 AM	#25
tysnappy Enlisted Member 6 Rep 43 Posts Drives: 335i Join Date: Mar 2015 Location: UK iTrader: (0)	So car misfired yday again went into limp mode on motorway... I was convinced that the misfire only really occurs when WOT (as it always seems to happen on the motorways when gunning it down the slip road to join the motorway), and if it drive the car nice and dont push it too much I never seem to get the misfire. Anyway out of interest I swapped the misfiring cylinders coilpack to another one so I could recheck my diagnostics to see if it followed the pack. Anyway I did that yday took the car for a long hard ride and it didn't misfire. Also driven loads today, driving the car differently and mixing it up to see if it could get it to misfire and its not done since. Maybe I was wrong and It wasn't occurring during WOT, and it was just random. if it was a faulty injector, wouldn't you expect it to be misfiring quite often. __________________ BMW 335i Coupé (2007) Black
	Appreciate 0 Quote

03-30-2015, 10:52 AM	#26
Phil325i Brigadier General 615 Rep 3,194 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Maybe one of the coils you swapped wasn't seated properly... __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
	Appreciate 1 Quote

03-30-2015, 12:09 PM	#28
tysnappy Enlisted Member 6 Rep 43 Posts Drives: 335i Join Date: Mar 2015 Location: UK iTrader: (0)	Cheers guys, ill keep an eye on it! Jesus, ive turned into a hypochondriac since getting this car haha! __________________ BMW 335i Coupé (2007) Black
	Appreciate 0 Quote

04-09-2015, 11:50 AM	#30
David1 Brigadier General 814 Rep 3,952 Posts Drives: 09 E92 09 X5 Join Date: Mar 2007 Location: Columbus, OH iTrader: (1)	You can't just move an injector. Both injectors would need to be coded to the new location and you ruin the seal when you move them around. You need to find a new shop. __________________ 2021 M2 Comp Sunset Orange \|Black with orange Stitching Dakota Leather\|Executive Pkg\|DCT
	Appreciate 0 Quote

01-26-2019, 09:27 AM	#31
Jbw.N54 Registered 0 Rep 1 Posts Drives: E90 2007 Join Date: Jan 2019 Location: Lumberton Texas iTrader: (0)	Misfire after changing injectors coils plugs and all fuel pumps. Hey guys I have an 07 335i stage 2 plus MHD I've changed all coils with bosh and plugs with bosh Changed all injectors index 11 and coded them Every time I start my car when it's cold (cold start) it will rev up like it should when cold then drops to normal idle but begins to misfire and shake keeps saying cylinder 4. Once o clear it and drive it. It doesn't misfire I can floor it on all 16psi of boost and car has no problem no stutters or anything. But once I slow down to a stop and it idles it idles rough but not enough to say misfire it will only misfire on a cold start. If it's warm at all it just shakes a little like a misfire but won't throw a code. Anyone have any idea. I assume it could be my DME but I haven't done a compression check yet. Also car just pops when I let off gas it dumps fuel and runs really rich but I don't have any cats all I have is a resonator. Please help if you know . Once again Changed plugs Changed coils Changed injectors All new and coded Changed hpfp Changed lpfp No leaks or wet plugs anywhere Car has 192k miles Walnut blasted it already Has hard charge pipe and bov
	Appreciate 0 Quote

01-26-2019, 12:06 PM	#32
arkie6 Lieutenant 397 Rep 433 Posts Drives: 2008 BMW 335i sedan Join Date: Aug 2014 Location: Russellville, AR iTrader: (0) Garage List 2008 BMW 335i [0.00]	Where did you get index 11 injectors? Are they new or what? Could injector #4 be leaking and causing the mis-fire and rich condition? You say no wet plugs, but have you shut the engine down when it is misfiring and then pulled plug #4 to check the condition of the electrodes? To rule out a faulty spark plug or coil (even new ones can fail), I would swap coil #4 with coil #1 and see if the mis-fire codes moves to #1 or stays with #4. If the mis-fire stays at #4, then I would swap spark plugs between #1 and #4. If the mis-fire code stays with #4, then it is likely injector related. Now swap injector #1 and #4 and see if the mis-fire code stays with #4 or moves to #1.
	Appreciate 0 Quote