Misfire help

drummerboy134 · 12-07-2015, 11:46 PM

Ok so I need some help I had a misfire which was injectors when I first bought my 08 335xi so I replaced all 6 with the newest ones. Misfire was fixed then couple months later I installed jb4 and right away had a Mis under load. Since then I have replaced vcg, plugs, coils, carbon blast. Pretty much everything that causes a Mis and still can't fix it. It's only missing under wot under 4K in 1st and 2nd and wot in any other gear. I use to be able to pull 3rd above 4K with no prob,but just recently I can't with out missing l. Any suggestions would be appreciated.

PNWN54 · 12-08-2015, 12:54 AM

Quote:

Originally Posted by drummerboy134

Ok so I need some help I had a misfire which was injectors when I first bought my 08 335xi so I replaced all 6 with the newest ones. Misfire was fixed then couple months later I installed jb4 and right away had a Mis under load. Since then I have replaced vcg, plugs, coils, carbon blast. Pretty much everything that causes a Mis and still can't fix it. It's only missing under wot under 4K in 1st and 2nd and wot in any other gear. I use to be able to pull 3rd above 4K with no prob,but just recently I can't with out missing l. Any suggestions would be appreciated.

Post a log.

drummerboy134 · 12-08-2015, 12:55 AM

Will do...the hpfp has dropped to like 2-3 during wot but it's rare it does and I have no other sign of it going or being bad

drummerboy134 · 12-08-2015, 05:38 AM

https://drive.google.com/folderview?...lU&usp=sharing

Here are 3 logs i did last night, note that i let off the throttle as soon as it misfired so last two logs are short. Also if you prefer the graph version instead just let me know.

jtswole · 12-08-2015, 06:37 AM

You just solved your own misfire problem.. Hpfp

drummerboy134 · 12-08-2015, 09:29 AM

Even tho it's only dropping maybe 1 out every 12 logs tho with no other symptoms?

Tonethejackal · 02-13-2016, 08:44 PM

Dboy - your ultimate solution?

drummerboy134 · 02-13-2016, 08:47 PM

It was the hold down strap for the 5+6th injector. It was stripped there for the injectors were bouncing around not sealing. Unfortunately the dealer re tapped it but the head was bored out by them bouncing around so it needs a new head to fully repair.

12-07-2015, 11:46 PM	#1
drummerboy134 New Member 2 Rep 9 Posts Drives: e90 Join Date: Jul 2014 Location: NY iTrader: (0)	Misfire help Ok so I need some help I had a misfire which was injectors when I first bought my 08 335xi so I replaced all 6 with the newest ones. Misfire was fixed then couple months later I installed jb4 and right away had a Mis under load. Since then I have replaced vcg, plugs, coils, carbon blast. Pretty much everything that causes a Mis and still can't fix it. It's only missing under wot under 4K in 1st and 2nd and wot in any other gear. I use to be able to pull 3rd above 4K with no prob,but just recently I can't with out missing l. Any suggestions would be appreciated.
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12-08-2015, 12:55 AM	#3
drummerboy134 New Member 2 Rep 9 Posts Drives: e90 Join Date: Jul 2014 Location: NY iTrader: (0)	Will do...the hpfp has dropped to like 2-3 during wot but it's rare it does and I have no other sign of it going or being bad
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12-08-2015, 05:38 AM	#4
drummerboy134 New Member 2 Rep 9 Posts Drives: e90 Join Date: Jul 2014 Location: NY iTrader: (0)	https://drive.google.com/folderview?...lU&usp=sharing Here are 3 logs i did last night, note that i let off the throttle as soon as it misfired so last two logs are short. Also if you prefer the graph version instead just let me know.
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12-08-2015, 06:37 AM	#5
jtswole First Lieutenant 42 Rep 380 Posts Drives: 335i Join Date: Mar 2014 Location: FL iTrader: (1)	You just solved your own misfire problem.. Hpfp __________________ Cam only...
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12-08-2015, 09:29 AM	#6
drummerboy134 New Member 2 Rep 9 Posts Drives: e90 Join Date: Jul 2014 Location: NY iTrader: (0)	Even tho it's only dropping maybe 1 out every 12 logs tho with no other symptoms?
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02-13-2016, 08:44 PM	#7
Tonethejackal Enlisted Member 10 Rep 46 Posts Drives: 2008 335i Join Date: Aug 2015 Location: Lavon, TX iTrader: (0)	Dboy - your ultimate solution?
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02-13-2016, 08:47 PM	#8
drummerboy134 New Member 2 Rep 9 Posts Drives: e90 Join Date: Jul 2014 Location: NY iTrader: (0)	It was the hold down strap for the 5+6th injector. It was stripped there for the injectors were bouncing around not sealing. Unfortunately the dealer re tapped it but the head was bored out by them bouncing around so it needs a new head to fully repair.
	Appreciate 0 Quote