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      11-24-2011, 08:40 PM   #1
sleeper335d
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335d JBD

I have a 2011 335d and I bought a JBD off a friend, I've hooked it all up and its giving me reduce engine power

Any one know whats that cause from
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      11-24-2011, 09:13 PM   #2
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Originally Posted by sleeper335d View Post
I have a 2011 335d and I bought a JBD off a friend, I've hooked it all up and its giving me reduce engine power

Any one know whats that cause from
Turn it down.
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      11-24-2011, 09:29 PM   #3
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Yeah, open it up to see we're it's dialed into. Start at just above the halfway setting.
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      11-24-2011, 10:22 PM   #4
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its already @ 50%
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      11-25-2011, 12:27 AM   #5
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Did you let the car go to sleep before putting in the jbd? If you didn't that would cause the car to throw a code.
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      11-25-2011, 08:54 AM   #6
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Check the chip to verify that it is the latest one - should help with the problem. Under $10 bucks from BMS for the update. Was suppose to fix the problem, but some still have problems when turned to 100%.
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      11-25-2011, 01:43 PM   #7
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Check the chip to verify that it is the latest one - should help with the problem. Under $10 bucks from BMS for the update. Was suppose to fix the problem, but some still have problems when turned to 100%.
I can't run mine above 80% without occasionally setting off the check engine light. I can't really tell a difference between the 80% and 100%...so it stays at 80. Even so...when I bought it from Burger, I was told that it was the newest chip and that I would have no issues running at 100% like most people want to do.
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      11-25-2011, 02:07 PM   #8
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I can't run mine above 80% without occasionally setting off the check engine light. I can't really tell a difference between the 80% and 100%...so it stays at 80. Even so...when I bought it from Burger, I was told that it was the newest chip and that I would have no issues running at 100% like most people want to do.
I think I'll tell BMS to change the mapping so 100% is like 80% is now. Less than half of the cars can run at 100% without codes but everyone complains when they can't use 100%. It will make life easier for everyone and only a few people will be missing out on the extra power.

On the OP maybe it was broken before he received it, maybe he installed it wrong, etc. If he needs help he can always email BMS.

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      11-25-2011, 10:30 PM   #9
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Yes car fell aleep, left it for 30 minutes before i installed the jbd keys i left in house

and how i know if it is the lastest one?
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      11-27-2011, 06:48 PM   #10
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I think I'll tell BMS to change the mapping so 100% is like 80% is now. Less than half of the cars can run at 100% without codes but everyone complains when they can't use 100%. It will make life easier for everyone and only a few people will be missing out on the extra power.

On the OP maybe it was broken before he received it, maybe he installed it wrong, etc. If he needs help he can always email BMS.

Mike
Why not program it for no codes at whatever level? My friend has it set at 80% and throws the reduced power code when you floor the car. AND the new chip was ordered and installed???
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      11-28-2011, 09:26 PM   #11
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JBD or BMW

Tbh, after seeing what the inside of the JBD unit looks like, I have assumed that it's not the car that results in code throws but variation between the JBD units. That dial on the inside is a total piece of crap. Don't get me wrong. I love my JBD, but I'm curious if anyone has exchanged or swapped units, or tried a problematic unit on more than one car. Basic troubleshooting.

KP
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      11-28-2011, 09:48 PM   #12
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Originally Posted by Kaylin032 View Post
Tbh, after seeing what the inside of the JBD unit looks like, I have assumed that it's not the car that results in code throws but variation between the JBD units. That dial on the inside is a total piece of crap. Don't get me wrong. I love my JBD, but I'm curious if anyone has exchanged or swapped units, or tried a problematic unit on more than one car. Basic troubleshooting.

KP
I have thought the same thing and raised this very question in another thread.
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      12-01-2011, 10:56 PM   #13
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Any update here?
I'm almost ready to order mines. Maybe another 1500 miles of so.
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      12-02-2011, 10:57 AM   #14
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I bought one about a month ago and have not had any problems what so ever. I am up to around 80% and have not thrown a code yet.
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      12-02-2011, 01:59 PM   #15
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Thats what I like to here! How many miles did you have when you installed?
I just hit 3k and I think I about ready to up the power.
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      12-08-2011, 09:45 PM   #16
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Why not program it for no codes at whatever level? My friend has it set at 80% and throws the reduced power code when you floor the car. AND the new chip was ordered and installed???
It doesn't work that way. BMW determines how much power can be added by setting their code trigger points. So the JBD has to work within those trigger points. Which is generally between 80-100% on the dial. The default setting is 65% and if you have a code at that setting you have some other problem. Either a loose cable/connection or completely unrelated to the JBD.

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      12-08-2011, 09:59 PM   #17
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
It doesn't work that way. BMW determines how much power can be added by setting their code trigger points. So the JBD has to work within those trigger points. Which is generally between 80-100% on the dial. The default setting is 65% and if you have a code at that setting you have some other problem. Either a loose cable/connection or completely unrelated to the JBD.

Mike
+1 ... exactly.

I recently installed the JBD in a friend of mine's car....

It set at 95%. After install, took the car out. Pushed it hard. Triggered a code. Turned ignition on and off. Pushed it hard, triggered a code again. Turned ignition on and off. Push is hard, NO MORE codes. Car has been driving at WOT, to redline and overall aggressively, and has not triggered a code in 650 miles... Possible that the car adapted and all is good now.

But, consensus seems to say, 80% is the safest/highest setting for not triggering codes. Plenty of people run at 100% with no codes, whereas some people cant run it above 65%.... that being said....

There is a little dial inside. It SEEMS OBVIOUS to me what position = which % setting, but my guess it some people still think they're setting it to one setting, but really are mistaken.


With the JBD in, gone is the laggy throttle response, and gone is the ability not to induce traction control at 2.5k rpms in sub-60 degree weather.
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      12-08-2011, 10:28 PM   #18
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I had 2K miles when I put the JBD on. Still at around 80% and not a code yet, I haven't been beating on it though
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      12-08-2011, 11:29 PM   #19
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I had 2K miles when I put the JBD on. Still at around 80% and not a code yet, I haven't been beating on it though

All it takes is 50-60% throttle to get nearly full thrust with JBD in, IMO....
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      12-10-2011, 03:07 AM   #20
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Installed my JBD today. I'm at 50% and it spins the tires much better. I'd recommend it.
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      12-11-2011, 10:24 AM   #21
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Installed my JBD today. I'm at 50% and it spins the tires much better. I'd recommend it.
Please. For smiles sakes, turn it up to 75-90. Difference is noticeable. Not a huge ton, but def noticeable.
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      12-12-2011, 06:23 PM   #22
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Mike,
Could you address a couple of questions that I have, which are mostly related to my newness to my car.

I have BMW Assist active. Will it transmit any code it receives to the dealership? Will it only do this when I activate it? Is there a priority of codes it will transmit? (like SES no, but limp mode yes)

Also, I think I have read that the CAN tool will not erase a limp mode error. Is that true? If so, isnt this a red flag for the dealer, given how wildly popular the JBD is and will continue to be?

I have also red that the little white connector piece we remove before install is brittle and likely will break after a few install/uninstalls. Are these parts that your company can acquire and provide for sale?

Obviously my concerns center around my warranty.....esp considering I plan on getting it extended to 100k. Thanks in advance.
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