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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Jb4 Users - 2/7 Firmware Changes:



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      02-17-2012, 09:53 AM   #1
phil200tdi
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Jb4 Users - 2/7 Firmware Changes:

Anyone tried the new 2/7 release? I'm going to load it up later as want to do some logs prior to hitting the pod on Sunday. Still no meth unfortunately.

Changes:

1) Revised fuel open loop algorithms to improve fuel trims. If you experience a fuel pump related code reduce fuel open loop mapping in increments of 5. If fuel trims are maxed out you can increase fuel open loop mapping in increments of 5 up to 100.
2) Added non-turbo map 8. It forces a 3100 limp code disabling turbos with 0% wastegate duty cycle. The final version uses CAN commands to suppress the CEL display in dash, but they are not properly working yet, so this firmware simply allows the CEL/SES to display in dash while map 8 is selected. Once you switch away from map 8 you will need to restart the motor to get your boost back.
3) Added fuel trims to logging as default under Exp1. Trims are displayed as -6% to +34% = 0-50. At 34% (50 in the logs) the DME can no longer add additional fuel and you'll start to see your AFR lean out.
4) Adjusted map3 meth auto learning to be more aggressive in reducing target boost when timing drops are observed while under meth flow.
5) If FutureUseD set to 100 water temp is used in place of oil temp for cold engine protection.
6) When on map 3 if using a CPS offset it is transitioned to 0 as a function of meth flow. Note if using map 6 CPS is NOT transitioned to 0.
7) Remapped CPS to include an additional degree of offset in 4th gear and an additional two degrees in 5th gear.
8) Modified interface to automatically restart firmware update in the event of a timeout during updates.
9) Fixed bug w/ startup sweep engaging randomly when JB4 is used on top of flash tunes or with the BT.
10) Adjusted 2step logic. Further changes are coming to accommodate the new MOSFET 2step circuit being tested in house now.
11) Added a "rattle fix" option. To enable set FutureUseD=99. If rattle is not reduced then you require mechanical adjustment or replacement of the wastegate assemblies.
12) Changed in dash gauge option 4 to over/under boost target. Middle is on target, to the left under target, to the right over target.
13) Added support for progressive methanol mapping on top of flash tunes.
14) Revised various interface field names to better reflect how they are used.
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      02-17-2012, 10:21 AM   #2
idnan
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Thanks, I never noticed the new firmware was out. I'm going to try it out now since I'm bored at work.

I'll give map 8 a go on the way back home from work to see how it feels n/a
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      02-17-2012, 11:05 AM   #3
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I wonder why an N/A map? Some sort of fuel economy mode?

Sounds like a slow drive home...


Wastegate rattle fix also sounds interesting.

I'll load this tonight too!
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      02-17-2012, 11:18 AM   #4
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I've got severly fecked turbos at the moment so would rather have them doing the least amount of work as possible. Just waiting for my new turbos and clutch to arrive and then I can get it sorted.

Fitted your meth kit yet?
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      02-17-2012, 04:00 PM   #5
phil200tdi
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Quote:
Originally Posted by idnan
I've got severly fecked turbos at the moment so would rather have them doing the least amount of work as possible. Just waiting for my new turbos and clutch to arrive and then I can get it sorted.

Fitted your meth kit yet?
No meth yet.

May fit the hardware tomorrow...
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      02-18-2012, 08:17 AM   #6
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Cheers phil,

I see the 2/7 interface is out too, but the 2/7 firmware is still a beta release only.

I think i'll give it a few weeks in beta before giving it a go
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      02-18-2012, 02:54 PM   #7
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My mate is at the Pod this weekend with his 700HP s/charged Corvette - you'll no doubt hear it Phil!
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      02-18-2012, 04:36 PM   #8
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I'll look forward to it!

Apparently there'll be some turbo civics too running low 12s...
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