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thedan86 thedan86 is offline
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Default n55 135i map 5 limp mode data log - 01-20-2018, 04:15 PM

hey guys, so whenever i go WOT (only tried in 2nd and 3rd) i get put into limp mode.
im running 30% e85 70% 98
i have a drop in K&N Air filter with stock intake
stock exhaust with muffler delete
running map 5
e82 135i n55 2011(australia)

getting one code consistantly 36c9

this is my first data logging post so any additional info let me know and ill get it up asap
Attached Files
File Type: csv limp mode.csv (17.1 KB, 13 views)
File Type: csv limp mode 2.csv (17.8 KB, 14 views)

Last edited by thedan86; 01-20-2018 at 07:34 PM.. Reason: adding code
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Steve @ BMS/Fuel-It!'s Avatar
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Default 01-20-2018, 07:30 PM

What are you logging with, a MAC?

You'll need to get the code and description with the JB4 and post that for assistance.



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thedan86 thedan86 is offline
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Default 01-20-2018, 07:36 PM

i am logging from a x64 Windows 10 laptop.

there is no description of the code on the JB4 and everything i can find online is very vauge.

ive edited my OP with the right code
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thedan86 thedan86 is offline
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Default 01-21-2018, 09:14 PM

so when i got the code with the jb4 it didnt have a description with it
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Default 01-22-2018, 12:23 PM

36C9 = DME, internal fault: Plausibility monitoring of the relative fuel mass


Your log looks funky, anything else plugged in to the OBDII port? Good/clean connection on the canbus wires?



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thedan86 thedan86 is offline
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Default 01-22-2018, 09:23 PM

no nothing plugged into the OBDII port
and the wire connections were clean and solid from memory. i might try cleaning the wires again with wax and grease remover and putting a touch of solder on them??

also what looks funky about it?
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keyap keyap is offline
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Default 01-23-2018, 05:22 AM

36c9 is usually triggered when fuelling request is outside what can be delivered.

I've only really seen it where people have scalars set incorrectly in a BEF, e.g. a PI BEF with scalars decaying too much in the upper RPM range will trigger 36c9.

As you don't have a BEF then something else is causing it.

I'd investigate as Steve suggest first and if that doesn't resolve, as it's a fuel related code, also consider switching your source of gas and E to see if that resolves.


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DD Map 7 at 20psi. Map 6 at 25psi for 'kill mode'

Last edited by keyap; 01-23-2018 at 12:01 PM..
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Default 01-23-2018, 10:18 AM

Yes, we solder our CANbus connections.



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thedan86 thedan86 is offline
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Default 01-31-2018, 09:58 AM

so i cleaned the CANbus wires and soldered them.

were no longer running map 5, or e85,

so i filled up with 98. I am now running map 1.

did not seem to pull very hard atall.... did a 3rd/4th gear pull and here are the logs
Attached Files
File Type: csv 180201_0327.csv (21.9 KB, 10 views)
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Default 01-31-2018, 03:48 PM

Log looks pretty normal, just octane deprived.



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