Misfires and lean issues.

[kaldyn55]

Good afternoon all!
I have 09 BMW 335xi with JB4 and intakes and running map 5 always.
My car has been misfiring at idle for sometime now.. but now I have been getting misfires at 6-5 gear. Example if i am in 6th gear doing 70 mpg When I floor it I get bad misfires. The only codes I got after my car goes to Limp mode is 29F2 and 29E2
I have changed my plugs and coils about 4k miles ago and my spark plug look nasty .. (pictures included) I did also compression test when engine was hot and I get 165 PSI on all cylinders...
My car currently have 64k miles only and i always use 93 gas.
I have attached picture of codes , picture of my spark plugs that have 4-5 k miles and JB4 logs (no misfires in 3rd gear)
1 log is on map 5, 3rd gear Wot
Second log is map 2 after o2 adaptation reset with Jb4 (Jb4 option 1/7)
Please help i need to fix this before i install single turbo kit,,,,

I have Index 5 injectors BTW
I did also change my fuel rail sensor from another used car trying to fix this issue but didn't get any luck after sensor swap..
My JB4 also goes to Map 4 frequently which is Lean error.

[Sticky]

Let's move this to the N54 section.

[kaldyn55]

Please move this Thread to N54...

[Sticky]

Please move this Thread to N54...

Ugh man wrong forum, sorry. Moved.

[kaldyn55]

can anyone help me?

[Sticky2]

Do the misfires happen with the jb4 disabled?

[Tuppidsay]

Without look at your logs, you say your misfiring at idle and your number 2 plug is black. Chances are you need injectors. Your probably needing a walnut blast too.

Looking at your logs....yikes. FF is almost maxed out, in one your low pressure fuel pump is dropping into the 40's, trims are maxing out, wgdc is using all of its adjustment range to keep boost on target, etc.

Id say at the very least, it's time to reset everything in the jb4 back to default values. FOL needs reset, duty bias's should be at 50, dwp to default, basically go to the jb4 forum and find the default settings and apply them.

Secondly, are you running meth? what kit? what size? how are you injecting?

Back end flash?

Id personally turn the meth kit off and see what happens after setting everything to default and doing some logs on map1 or 2.

Also turn on 6cyl timing so you can see timing on all your cylinders, not just cyl 1

[kaldyn55]

Sticky2, Yes at idle only ,, also i get weird idle ,RPMs don't want to stay at same idle speed. its not fluctuating badly just idle speeds never same after each stop.

[kaldyn55]

Tuppidsay
I did valve cleaning twice already with brushes. last one i did i cleaned the valves to 97% clean about 5k miles ago when i swapped my plugs and coils..
About FF my wastegates are rattle badly thats why i bought single turbo but i wont install it until i fix these issues.
I did set everything to default settings yesterday in JB4. All my duty bias was at 0 before so ... i set it to 50, and I did option 1/4 to reset all values.. in jb4
I am not running meth nor any back end flash.
Once I select timing in all cylinders do i do log again?
is my LPFP failing?

[Tuppidsay]

Yes reset everything, turn on 6cyl timing for your dme ver and log again, 3rd gear pull in map2. And yes from the looks of it the lpfp is having a hell of a time keeping up. Hpfp seems happy so im not sure if it is causing your particular problem but it is a problem.

Im fairly set on the fact that you need injectors. index 5 with rough idle and a black plug on cylinder 5 even though the plugs are fairly new is very telling that cylinder 5 is your issue. You've also got split trims. Not by alot but its there.

Your gonna want a custom back end flash with your single. At the very least the bms one. Might as well bite the bullet now and buy the bef module in mhd and a cable and do it. Pump bef from bms would be fine for now.

[kaldyn55]

Tuppidsay thank you for reply and help.
It's injector #2 I posted second image where I numbered my plugs. Enabling all cylinders timing are done in Jb4 correct? And how do I find out my Dme I have 2009 bmw 335xi February production date.
I guess I need to get Jb4 single turbo kit map update? What bef mhd do I get?
I have the cable I only need tablet and small otg cable
How can I have dealer replace my injectors since they got warranty?
What causes split trimming?

[Tuppidsay]

If your gonna try to get injectors done at the dealer, your gonna have to remove all your aftermarket stuff and jb4 to be safe and clear all the codes with inpa or something like that. Then take it into bmw for the shaking at idle.

Enabling all the cylinders is done in the jb4 program on a laptop. Maybe you can do it on the app. not sure. You have Ijaos dme or something like that.

If you have a cable you could use a laptop and the bimmerboost flasher program instead of mhd. No real reason to pay for mhd if just doing the bef. For now you would want the standard pump bef. Later i believe theres a single turbo bef for after you do your single conversion. Make sure you have a good 50-70amp battery charger connected or jumper cables to another car that is running. And while flashing don't do anything to your car. don't touch the doors, windows, dome light, play with the radio, NOTHING! And make sure your jb4 is in map0.

The split trims are caused by either fuel or air flow differances between the front 3 cylinders and the rear 3 cylinder. Your are not too bad. Probably injector related.

[iminhell1]

Before you buy new injectors, pull the old ones and make sure the seals are actually there, and then replace all of them.

Mine acted similar when I blew 1 seal out.

... and why does it look like none of those plugs where tight?

[kaldyn55]

They might of been lose? My seals are there. My original (first) set of plugs looked same with Cylinder 2 black like that.

[kaldyn55]

Here is a log with 6 cylinder timing.
Today i took out my plugs and they looked clean...
New Logs are named 3.22.18

[Tuppidsay]

well, things are still strange. High fuel pressure seems kinda high. low pressure is too low. your csv is showing a meth pid even though meth is off and you don't have meth. screen shot your settings page from the jb4 app. Also check your menu 4 setting in the gauges. Should be 4-3

[kaldyn55]

I'll post ss later my speed gauge is set to 4 then my tech set to 3..

[kaldyn55]

Here are JB4 screen shots

[kaldyn55]

well, things are still strange. High fuel pressure seems kinda high. low pressure is too low. your csv is showing a meth pid even though meth is off and you don't have meth. screen shot your settings page from the jb4 app. Also check your menu 4 setting in the gauges. Should be 4-3

I posted my screen shots above please help me. You think it's Jb4 that's causing this? How do I rest jb4

[Tuppidsay]

So at this point you need to get your fuel injectors dealt with and them maybe your fuel pump. The jb4 keeps boosting hpfp to try and richen up the engine but its not making a differance. If you injectors are under recall/warranty (call the dealer and double check with your vin) . get it done and we can go from there.

[ahad5058]

If this is not already resolved i had the same issue and did 2 things that helped me immensely.

I added a mhd backend pump flash. Also cleaned the 2 map sensors (one of the orings was broken)

Hope this helps.