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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Jb4 Help ?



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      04-11-2016, 01:25 PM   #1
ChaiLatte
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Jb4 Help ?

Hey everyone need some help today. I installed a jb4 to my car after I got a misfire in cylinder 5 after doing a pull in 3 gear it started to stutter and stuff soon enough I got a service engine soon light. I just replaced all my plugs and coils and tried to clear codes with my boys scanner. It didn't work the code wouldn't go away and kept showing up. After I brought the car home and cleared the dme using the jb4 interface and the code actually disappeared now. I'm thinking it could be a injector but I want a little more info on this I had a low boost code it's clear now and the car was left on for like 5 mins.
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      04-11-2016, 02:00 PM   #2
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What was the code?
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      04-11-2016, 02:13 PM   #3
ChaiLatte
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Quote:
Originally Posted by CantCatchMe View Post
What was the code?
On my boys scanner it was misfire cylinder 5 on jb4 it's was low boost engaged 3100
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      04-11-2016, 03:01 PM   #4
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Bump anyone can help me lol
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      04-11-2016, 03:25 PM   #5
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Bump for dirty chai latte
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      04-11-2016, 03:41 PM   #6
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Make sure your settings are where they're supposed to be, do a third gear log from 2.5k-redline, make a thread in the support section of n54 tech site.

Logs may show why you misfired, or maybe its something else. The jb4 has great support, you can also read the ultimate misfire thread that is sticky in the n54 subsection of this forum.

Its really hard to say without much info on why something's happenening.
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      04-11-2016, 04:01 PM   #7
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Quote:
Originally Posted by Dhillon92 View Post
Make sure your settings are where they're supposed to be, do a third gear log from 2.5k-redline, make a thread in the support section of n54 tech site.

Logs may show why you misfired, or maybe its something else. The jb4 has great support, you can also read the ultimate misfire thread that is sticky in the n54 subsection of this forum.

Its really hard to say without much info on why something's happenening.
Alright about to do that now
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      04-11-2016, 08:26 PM   #8
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Quote:
Originally Posted by Dhillon92 View Post
Make sure your settings are where they're supposed to be, do a third gear log from 2.5k-redline, make a thread in the support section of n54 tech site.

Logs may show why you misfired, or maybe its something else. The jb4 has great support, you can also read the ultimate misfire thread that is sticky in the n54 subsection of this forum.

Its really hard to say without much info on why something's happenening.
+1


Let us know if the issue gets fixed
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      04-11-2016, 10:34 PM   #9
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Quote:
Originally Posted by ChaiLatte
Hey everyone need some help today. I installed a jb4 to my car after I got a misfire in cylinder 5 after doing a pull in 3 gear it started to stutter and stuff soon enough I got a service engine soon light. I just replaced all my plugs and coils and tried to clear codes with my boys scanner. It didn't work the code wouldn't go away and kept showing up. After I brought the car home and cleared the dme using the jb4 interface and the code actually disappeared now. I'm thinking it could be a injector but I want a little more info on this I had a low boost code it's clear now and the car was left on for like 5 mins.
What plus are you using and what are they gapped at? What fuel are you running? What supporting mods do you have?
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      04-13-2016, 05:09 PM   #10
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Quote:
Originally Posted by M.a.r.k.u.s View Post
What plus are you using and what are they gapped at? What fuel are you running? What supporting mods do you have?
its the regular Bosch plugs. I just replaced all my plugs and coil packs. Im runnnig jb4 with a charge pipe and thats about it.
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      04-13-2016, 05:11 PM   #11
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Quote:
Originally Posted by mike@x-ph.com View Post
+1


Let us know if the issue gets fixed
I think i found out what is it my injector looks like its leaking i took out my spark plug form cylinder 5 and it looked like there was fuel around it the other plugs looked fine apart from the rest. Just ordered some injectors hopefully that fixes my issue.
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      04-13-2016, 05:14 PM   #12
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Quote:
Originally Posted by ChaiLatte View Post
I think i found out what is it my injector looks like its leaking i took out my spark plug form cylinder 5 and it looked like there was fuel around it the other plugs looked fine apart from the rest. Just ordered some injectors hopefully that fixes my issue.
if that doesn't fix it, try and adjust the plug gap to 0.22. I think the standard plugs are gaped to 0.32, so with more boost and power, that could potentially cause a misfire.
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      04-13-2016, 05:18 PM   #13
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Quote:
Originally Posted by M.a.r.k.u.s View Post
if that doesn't fix it, try and adjust the plug gap to 0.22. I think the standard plugs are gaped to 0.32, so with more boost and power, that could potentially cause a misfire.
I will definitely try that next if injectors don't fix the problem.
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