JB4 Map 5 datalog, Look normal?

Zacm829 · 07-14-2014, 04:34 PM

First off this community seems to be great and I have already learned a alot from the multiple threads on tuning and modifications.

Car is a 2007 335i w/ BMS DCI/JB4 G5 iso

Car will run great in lower gears in map 5 and 1. Once I start getting into higher gears and rpms, ie 5th gear 4500rpm. The JB4 will default to fail-safe map 4. I tried to log this occurrence, but it did not swap maps when I was logging.

I checked codes multiple times after it defaulted to map 4 and got no codes. Can anyone tell me if the log has any telltales of a lean conditions. I see that my AFRs do creep up to 16 at times under boost.

I have ordered new spark plugs that will go in next week, I'm starting to wonder if my HPFP is showing signs of fatigue although I don't have long starts or other symptoms.

Thanks in advance for all and any help!

http://datazap.me/u/zacm829/071414-b...=1-3-4-6-18-19

09E90utah · 07-14-2014, 04:43 PM

It looks like you're pulling a lot of timing and your fuel trims look high. Are your running E85?

I've found that posting my logs on n54 tech, I seem to get a lot of support for that since BMS is over there.

Zacm829 · 07-14-2014, 06:32 PM

I'll cross post on n54 tech as well, thanks for the tip.

No e85 yet, just straight 93 octane. I thought the timing looked a little odd, thanks for the help!

07-14-2014, 04:34 PM	#1
Zacm829 New Member 0 Rep 6 Posts Drives: '07 335i Sport-With Mods Join Date: Jul 2014 Location: Charlotte, NC iTrader: (0)	JB4 Map 5 datalog, Look normal? First off this community seems to be great and I have already learned a alot from the multiple threads on tuning and modifications. Car is a 2007 335i w/ BMS DCI/JB4 G5 iso Car will run great in lower gears in map 5 and 1. Once I start getting into higher gears and rpms, ie 5th gear 4500rpm. The JB4 will default to fail-safe map 4. I tried to log this occurrence, but it did not swap maps when I was logging. I checked codes multiple times after it defaulted to map 4 and got no codes. Can anyone tell me if the log has any telltales of a lean conditions. I see that my AFRs do creep up to 16 at times under boost. I have ordered new spark plugs that will go in next week, I'm starting to wonder if my HPFP is showing signs of fatigue although I don't have long starts or other symptoms. Thanks in advance for all and any help! http://datazap.me/u/zacm829/071414-b...=1-3-4-6-18-19 Attached Images Last edited by Zacm829; 07-14-2014 at 04:41 PM..
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07-14-2014, 04:43 PM	#2
09E90utah Private First Class 6 Rep 101 Posts Drives: 2009 335i x-drive Join Date: Apr 2012 Location: Salt Lake City, Utah iTrader: (0) Garage List 2009 BMW 335i xDriv ... [0.00]	It looks like you're pulling a lot of timing and your fuel trims look high. Are your running E85? I've found that posting my logs on n54 tech, I seem to get a lot of support for that since BMS is over there.
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07-14-2014, 06:32 PM	#3
Zacm829 New Member 0 Rep 6 Posts Drives: '07 335i Sport-With Mods Join Date: Jul 2014 Location: Charlotte, NC iTrader: (0)	I'll cross post on n54 tech as well, thanks for the tip. No e85 yet, just straight 93 octane. I thought the timing looked a little odd, thanks for the help!
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