[seccsc]

Originally Posted by Rossifumi

AA Active Processor, I'm running 98 octane gas (I'm in Sweden). Only other mod is a AC Schnitzer exhaust.

I was on full throttle in third gear and just before redline the car started to stutter and I got a half engine light and "Engine fault, reduced power". The engine did stutter for maybe a minute everytime I tried to apply some throttle but after one minute the light went away and the engine was running fine again.

Hello,
I had the same thing happen to me. I dropped the car off at the dealership and they said it was the Low Pressure Fuel Pump NOT the HPFP.
Check out this thread I started.....
http://www.e90post.com/forums/showthread.php?t=136652

[Slimer777]

Originally Posted by p996c2

I had exactly the same problem as Rossifumi describes, so Redlining in 3th gear (Steptronic) right after install of the AA processor (150 km). I am running 95 octane gas (Netherlands). After the half engine light and "Engine fault, reduced power" I stopped the car, restartet it again, then the light was gone.

Can my dealer see that this happened in the computer during service?

Thanx

Both my AA AP and FMIC is on their way...... now I am having doubts. Should I install them?

[jcarlucci1]

Someone from AA needs to get on here and find out whats going on with all these codes/limps.

[kompey]

I've install active processor on my 135i 2 weeks ago.
I use only agip blusuper(98 octane)gas...I've take some time the redline and for now no one problem or light.
Today I give gas on 3rd gear and at 6000 rpm it has seemed to me that the car stutter,but after few second all is returned ok and there aren't no light....at this time I'm not sure if was the engine or the street condition.....however,for now,no problem
If someone is interested I've dyno of active processor

[e.n335]

Originally Posted by kompey

I've install active processor on my 135i 2 weeks ago.
I use only agip blusuper(98 octane)gas...I've take some time the redline and for now no one problem or light.
Today I give gas on 3rd gear and at 6000 rpm it has seemed to me that the car stutter,but after few second all is returned ok and there aren't no light....at this time I'm not sure if was the engine or the street condition.....however,for now,no problem
If someone is interested I've dyno of active processor

I am very interested in the dyno . Can you post it ?

[e.n335]

It's not clear whether the cars with the limp modes have fully adapted to the tune when it occured. I will test the shift 3-4 at redline on the weekend and try to reproduce the issue. Most likely the limp mode is stored in the ECU and can only be deleted by hooking up the car to the BMW service computer ( DIS ). I would appreciate AA chiming in what they think about the situation.

[kompey]

power with AA
http://img367.imageshack.us/img367/8...potenzaug1.jpg

torque with AA
http://img387.imageshack.us/img387/4...oactivekj8.jpg

power stock
http://img517.imageshack.us/img517/3...potenzazx7.jpg

torque stock
http://img387.imageshack.us/img387/6...dcoppiaxo5.jpg

power AA vs stock
http://img517.imageshack.us/img517/7...zatuttedw0.jpg

torque AA vs stock
http://img517.imageshack.us/img517/5...iatuttenb3.jpg

[e.n335]

Originally Posted by kompey

power with AA
http://img367.imageshack.us/img367/8...potenzaug1.jpg

torque with AA
http://img387.imageshack.us/img387/4...oactivekj8.jpg

power stock
http://img517.imageshack.us/img517/3...potenzazx7.jpg

torque stock
http://img387.imageshack.us/img387/6...dcoppiaxo5.jpg

power AA vs stock
http://img517.imageshack.us/img517/7...zatuttedw0.jpg

torque AA vs stock
http://img517.imageshack.us/img517/5...iatuttenb3.jpg

Thank you very much for providing the dyno charts !

[e.n335]

Anybody knows the codes stored in the ECU due to the limp modes ?

[e.n335]

Basic adaption should be done within 1-2 days. There will be minor further adaption, I expect the ECU should have full adapted after one week or so.

I disconnected the battery during the install ( so longer than 1 hour ) and tried to force the adaption by accelerating a couple of times @ WOT up to 5000 rpm, then 5500 rpm, then 6000 rpm ... up to redline. This works for me quite well.

However, I am surprised that we have issues with this fairly mild tune. I did not have a single issue, the gas milage is good and the tune is very smooth. I am very interested to dig into this issue thus I think the product is very good and worth to investigate to mitigate the issue. I hope somebody from AA will read the thread and chime in soon.

[e.n335]

Originally Posted by Rossifumi

My car is going in to the dealer for a scheduled service this monday, I can tell them to give me the specific code. I will not bother to remove the AA Processor before the service.

+1

Please remove the AA Active Processor before the service and try to get the code. This will be great help for further activities. I will try to get a limp mode on the weekend, I have a very open-minded dealership and a very good relationship with them. However, I have to be able to get a limp mode for further assistance from my side.

[seccsc]

Originally Posted by Rossifumi

I got another one, but it only occurs when doing a kick-down (in DS) from 6th to 3rd gear. If I just start in 3rd and floor its all fine

Does this consistantly happen or just part of the time?
Mine would happen with the kickdown form 6th to 2nd gear 40MPH. But not all of the time. But I did get it to come in with the AA and stock.
That's what lead the dealership to believe it was the LPFP.

[scalbert]

Originally Posted by e.n335

Basic adaption should be done within 1-2 days.

Only if you drive a few miles a day.

The car adapts much quicker than that. In fact, after a few hard pulls the car will be adapted.

[e.n335]

Originally Posted by Rossifumi

Why do you want me to remove the box before the service? Or did you mean that I should remove the box and try to get the limp mode on a stock car?

If you would not have errors stored in the ECU I would not bother to go in for service with the AA installed. Thus you have some, I would not risk to get blacklisted ...

[scalbert]

Originally Posted by jcarlucci1

Someone from AA needs to get on here and find out whats going on with all these codes/limps.

I disagree, the individuals who have had issues should be in contact with AA. It is not AA's responsibility to browse the forums in an attempt to find issues.

[e.n335]

Originally Posted by scalbert

Only if you drive a few miles a day.

The car adapts much quicker than that. In fact, after a few hard pulls the car will be adapted.

IIRC Shiv recommended to drive 30 or 50 ? miles before you push the car at all ...

[e.n335]

Originally Posted by Rossifumi

Sounds fair, but my warranty ends in 1 month so I just thought that I would save myself the trouble... Maybe I should think twice about it.

I would not risk anything. BMW covers some parts for quite some time even when the warranty already ended. The German word for this is "Kulanz", so obligingness ?

[scalbert]

Originally Posted by e.n335

IIRC Shiv recommended to drive 30 or 50 ? miles before you push the car at all ...

I don't recall seeing that. However, he may have been very conservative with it. There is a period of adaptation and the amount depends on which tune (and version). V2.0x required a few pulls to get things settled down. V3 requires no wait time; just update and go.

Seeing how, when boost control is considered, the new AA unit is similar to V1.x that would be a fair comparison. You also have to consider what is adapting; fuel, spark and air (boost). Fuel is pretty much ready right away due to the closed loop system. Spark will adapt quickly otherwsie the JBxxx would not work as well as it does. The boost control will adapt within a few pulls as well as it is the factory system controlling it.

Should it be thrown in an inmediately go WOT, NO. You want to be sure there are no issues at first. But easing into the throttle is fine and then once sure, get on it let it adapt at how you want to drive it.

In the end, five hard pulls and you are set with any current tune.

[e.n335]

Originally Posted by scalbert

I don't recall seeing that. However, he may have been very conservative with it. There is a period of adaptation and the amount depends on which tune (and version). V2.0x required a few pulls to get things settled down. V3 requires no wait time; just update and go.

Seeing how, when boost control is considered, the new AA unit is similar to V1.x that would be a fair comparison. You also have to consider what is adapting; fuel, spark and air (boost). Fuel is pretty much ready right away due to the closed loop system. Spark will adapt quickly otherwsie the JBxxx would not work as well as it does. The boost control will adapt within a few pulls as well as it is the factory system controlling it.

Should it be thrown in an inmediately go WOT, NO. You want to be sure there are no issues at first. But easing into the throttle is fine and then once sure, get on it let it adapt at how you want to drive it.

In the end, five hard pulls and you are set with any current tune.

Thanks a lot for the brief explanation. Comparing the AA Active Processor with PROcede v1.4n sounds very fair. However, I am not sure if this is true for the hardware as well.

[e.n335]

Sent an email to AA whether they are aware about the situation. I'm sure we get an answer soon.

[e.n335]

AA replied, you'll get a PM.

[e.n335]

please keep us informed. IMO the problem does not seem to be very common, however 3 or 4 cases already. Good luck !