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Quentin99 Quentin99 is offline
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Default JB4 log. Car feels choppy in power. - 02-08-2017, 12:04 PM

2009 bmw 135i 73500 miles. Plugs done about 20k ago walnut blasting done 10k ago. Mods afe charge pipe. Magnaflow axle back, dci, jb4 g5 board

Car seems to surge around 3k.

http://www.***********/u/quentin99/lo...-3-4-5-9-14-23
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Default 02-08-2017, 12:10 PM

You'd need to attach the JB4 CSV files for us to look at the log in more detail.


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Quentin99 Quentin99 is offline
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Default 02-08-2017, 12:19 PM

Sorry about that. I had an issue uploading it last time.

Also this is the latest firmware for the jb4 correct?
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File Type: csv 170205_1823.csv (13.0 KB, 238 views)
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Default 02-08-2017, 06:26 PM

No, there is a new version of firmware. What is menu 11 set to? Looks like you could use some better fuel and a free backend flash.



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Default 02-08-2017, 06:33 PM

I will check what menu 11 is set too. Isnt the back end flash better if you have more than 450 hp? Im running shell 93 fuel
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Default 02-08-2017, 06:40 PM

No, the pump flash is better when running straight pump gas.



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Default 02-08-2017, 06:44 PM

Ok is there any way to revert back to factory after you do a back end flash incase i need injectors or a hpfp under warranty?
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Default 02-08-2017, 06:46 PM

Menu 11 is on 0
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Default 02-08-2017, 07:05 PM

This is what map 4 looks like.
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File Type: csv map 4.csv (10.5 KB, 209 views)
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Default 02-09-2017, 09:49 PM

Set menu 11 to 1000 and yes, you can flash back to stock. If using BB, you need to save a copy of your stock flash. If using MHD, no need to save a copy of the stock flash.



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Default 02-14-2017, 02:09 PM

I set menue 11 to 1000. Its been snowing the past few days. Ill get a log later but I still feel the surge at 3k which is about the time the car runs super lean. I have to get a new dcan cable to do the backend flash
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Default 02-20-2017, 09:00 PM

I can trigger the reduced power light without trying not. Set codes relating to the hpfp on the way home but no laptop. The logs I could only get boost over trigger and low boost mode engaged to trigger the reduced power mode.
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File Type: csv hpfp.csv (17.6 KB, 213 views)
File Type: csv hpfp2.csv (12.0 KB, 204 views)
File Type: csv hpfp3.csv (12.8 KB, 212 views)
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Default 02-20-2017, 10:38 PM

Please do logs as recommended....

http://www.n54tech.com/forums/showpo...21&postcount=1



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Default 02-21-2017, 11:52 AM

Sorry about that I didnt know that every log should be done in 3rd.

so I did 2 3rd gear pulls and one in 4th

The one labeled 4 is a 4th pull. The one labeled q is a 3rd gear pull that starts around 3400rpm. Couldn't slow down enough due to traffic behind me. The other one was the on ramp pull.

Also the codes are 29f2 29e2 30fe and 3100. I havent been able to get the first 2 codes to pop up since I've been logging
Attached Files
File Type: csv 4.csv (4.4 KB, 194 views)
File Type: csv 170221_0853.csv (5.1 KB, 206 views)
File Type: csv q.csv (7.7 KB, 204 views)

Last edited by Quentin99; 02-21-2017 at 12:07 PM..
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Default 02-21-2017, 12:14 PM

Looks like issue is menu4 is set to 2 for a back end flash, but no back end flash is loaded. Set it to 3.


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Default 02-21-2017, 12:32 PM

Thats weird it was set to 2. I changed it to 3 and did 2 pulls
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File Type: csv map.csv (6.4 KB, 219 views)
File Type: csv test.csv (8.2 KB, 220 views)
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Default 02-21-2017, 04:44 PM

So I'm not sure if this is useful or not but I logged my whole ride home. At points that afr hits 20 and at other points the trims are maxed out. My drive home is about 70% highway.
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File Type: csv home.csv (84.8 KB, 200 views)
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Default 02-21-2017, 10:55 PM

That is really odd. You have the stock flash and set menu 4 to option 3 with the steering wheel controls?



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Default 02-22-2017, 06:05 AM

Yeah. My friend drove my car yesterday and he probably thought he was changing maps. But I still have the issue with it running lean and it surging around 3k. I have the cable coming in to do the backend flash. Coukd my hpfp be on its way out making it run lean?
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Default 02-22-2017, 11:16 AM

AFR's look normal but FOL is maxed so you won't be able to do much until you get the flash.



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Default 02-25-2017, 09:47 AM

I put the back end flash on last night the car. The car runs better. I dont feel the 3k surge anymore. I know i need to run some logs. According to the gauge hijacking Im running like 18 pounds of boost in map 2 and 1
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Default 03-04-2017, 12:07 PM

Installed the Back End Flash and logged. Heres the log. I was told that I should be in map 2 running 93.
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Default 03-08-2017, 11:56 AM

So according to the log I hit 18.2 pounds of boost and I should only hit 14.5 in map 2. Also the other night I was driving and the car just lost all power didnt set a half engine light or anything so I shut it off and turned it back on and it was fine. Found this code later though 30FC Exhaust fume turbo charger, density.
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Default 03-08-2017, 04:24 PM

When running the JB4 with a back end flash, map 2 targets 17 psi. Map 1 is 15 psi and map 7 is 19...


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Default 03-08-2017, 09:52 PM

Enable your 6-cyl timing. As stated, with a flash your boost targets will be higher.



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