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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 > N55 Jb4 issues, car won't work...



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      02-02-2013, 10:29 AM   #1
e92sport
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I just recently did the switch to jb4 stg 2 ISO with flex fuel wires. I pumped a 40% mixture of e85. I did a couple pulls in 3rd with no issues. My last 3rd gear pull the car through a half check engine sign, service engine soon, a car on a lift and some triangle with a circle around it and and exclamation mark next to it.

My jb4 controls stopped working and the car did not want to turn back on. I checked all my connections and they were all perfect. So I took out the jb4 and the car turned on but I still had the half check engine light and service engine soon.

I plugged in the jb4 again when I got home and it wouldn't connect to the computer. I rechecked the power wire and the 50 amp fuse and it seems fine.

So I took off the jb4 again and I threw on my Procede v5 to see if maybe the issue was the jb4. My Procede controls work and the car starts and shuts off right away. I tried deleting the DME codes with the Procede but I guess it didn't delete them.

Is there anyway I can read these codes on my car?

I'm trying to stay away from taking the car back to the dealer at the moment before having to take all my boltons off.
Anyone know what may have caused this issue?

My current codes thrown are:

10720, 12253, 11352, 11375
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      02-03-2013, 03:13 PM   #2
paradoxical3
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Did you cut the diode off the JB4?
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      02-03-2013, 04:53 PM   #3
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Sounds serious, hope you get it figured out
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      02-03-2013, 09:56 PM   #4
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I don't understand why so many people have had this problem. I have the ISO update and I don't have this problem. I think the problem might be wrong installation
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      02-04-2013, 08:37 PM   #5
SRT14PimPin07
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Ever figured out the problem?
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      02-06-2013, 08:39 AM   #6
e92sport
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Quote:
Originally Posted by paradoxical3
Did you cut the diode off the JB4?
I cut the leg off just like its done in the Instructions.
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      02-06-2013, 08:44 AM   #7
e92sport
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Quote:
Originally Posted by SRT14PimPin07
Ever figured out the problem?
Terry told me its my tmap sensor or the tmap sensor signal output.

I'm taking it to the dealer to see the issue.

I get the following codes:

10720
12253
11375
11352

And after I get the codes deleted I get only

10720
11375
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      02-06-2013, 09:10 AM   #8
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Quote:
Originally Posted by e92sport View Post
I cut the leg off just like its done in the Instructions.
You have to cut off the whole thing not just one leg.
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      02-06-2013, 01:03 PM   #9
e92sport
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Quote:
Originally Posted by fasteddie222
Quote:
Originally Posted by e92sport View Post
I cut the leg off just like its done in the Instructions.
You have to cut off the whole thing not just one leg.
It gave the option in the instructions and Terry confirmed it doesn't matter.
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