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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 07-15-2014, 02:32 PM
zapprint zapprint is offline
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Location: Calif
 
Join Date: May 2006
Posts: 15
Mein Auto: 530i
Throttle Lag 328ic Is there a software fix?

I saw on another post that there is a service bulletin to fix the issue SI B12 17 12
But the dealer says this does not apply to the N51 engine.
I would have to assume this is a common complaint, there is another Service Bulletin?
If anyone has the correct one for my model, I would greatly appreciate it, as I have less than 100 miles left on my warranty!

Thanks
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  #2  
Old 07-15-2014, 05:00 PM
Boraxo Boraxo is offline
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Mein Auto: ED 330i
I have a throttle lag on the 330i, wonder if that was covered by the bulletin. It is frustrating that auto makers refuse to provide TSBs to a centralized public database.
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  #3  
Old 07-16-2014, 06:32 AM
fdriller9 fdriller9 is offline
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That's just the way the N51/2 engines are tuned. There is a gap in the throttle.

You can buy a tune like the Burger Tuning PBX or AA tune to eliminate this lag. These tunes alter the throttle mapping and remove the lag in the throttle.

I would go with the AA tune but the PBX allows you to change throttle mapping from 30%,50%, 100% etc. I'm not sure if those are the exact values but it's something along those lines
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  #4  
Old 07-16-2014, 09:31 AM
LJ35 LJ35 is offline
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Mein Auto: 2008 BMW 328i
I installed the PBX and it made a noticeable difference in throttle response.
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  #5  
Old 07-16-2014, 11:10 AM
pmcu pmcu is offline
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Quote:
Originally Posted by fdriller9 View Post
That's just the way the N51/2 engines are tuned. There is a gap in the throttle.

You can buy a tune like the Burger Tuning PBX or AA tune to eliminate this lag. These tunes alter the throttle mapping and remove the lag in the throttle.

I would go with the AA tune but the PBX allows you to change throttle mapping from 30%,50%, 100% etc. I'm not sure if those are the exact values but it's something along those lines
Please do not go with the PBX, I have an 09 N51, and had the PBX since 2010, and replaced it with an AA tune in 2012, so as someone who's had both for a long time, there is no comparison between the result of the two, especially given the price and effort involved.

By that i mean, in addition to the clear different feel in performance between the two, with AA being stronger and smoother. Additionaly, while the PBX IS marginally cheaper, but there is no plug and play version of it like the JB, you will have to remove many pieces in the engine and open the ECU, take out each of the 8 to 10 little pins wires and wrap each connection in electrical tape (which btw, WILL become sticky as the heat melts the glue a bit), and then jam the ECU connectors back in. I've done this 3 times before taking the car in for warranty repair and still dread the process.

AA on the other hand, just plugs into your diagnostic port, flashes the software, and done.

Whichever choice you go with, depending on where you are in california, if you do need any help with installing pbx or aa, feel free to reach out and i'll give you some pointers

Last edited by pmcu; 07-16-2014 at 11:13 AM.
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  #6  
Old 07-16-2014, 11:30 AM
fdriller9 fdriller9 is offline
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Quote:
Originally Posted by pmcu View Post
Please do not go with the PBX, I have an 09 N51, and had the PBX since 2010, and replaced it with an AA tune in 2012, so as someone who's had both for a long time, there is no comparison between the result of the two, especially given the price and effort involved.

By that i mean, in addition to the clear different feel in performance between the two, with AA being stronger and smoother. Additionaly, while the PBX IS marginally cheaper, but there is no plug and play version of it like the JB, you will have to remove many pieces in the engine and open the ECU, take out each of the 8 to 10 little pins wires and wrap each connection in electrical tape (which btw, WILL become sticky as the heat melts the glue a bit), and then jam the ECU connectors back in. I've done this 3 times before taking the car in for warranty repair and still dread the process.

AA on the other hand, just plugs into your diagnostic port, flashes the software, and done.

Whichever choice you go with, depending on where you are in california, if you do need any help with installing pbx or aa, feel free to reach out and i'll give you some pointers
You do realize that I suggested the AA tune over the PBX right?......
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  #7  
Old 07-17-2014, 01:41 PM
pmcu pmcu is offline
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Quote:
Originally Posted by fdriller9 View Post
You do realize that I suggested the AA tune over the PBX right?......
Of course, I did not disagree with your recommendation at all, i'm with you and all for AA as well. The only thing I had added to your two alternatives was to give the guy a bit of more insight on the installation process of the two since for someone who's just starting to look at these, PBX is pretty attractive on paper with the cheaper price initially. We want to save him the trouble
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