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      02-25-2014, 03:12 PM   #8383
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Quote:
Originally Posted by lfpontes View Post
HELP!

Hello,

I own a 335i E90 N54 auto here in Brazil.. It has AMS DP, K&N inbox, COBB, and AA BOV .

Everytime I change my current map with the cobb system, the car seems to be stuck in 2nd or 3rd gear for a while, and suddenly it drops to 1st after a few ft of driving and everything stays normal.
This only happens right after I switch the map, when I turn on the car. And only one time every time the map is switched.

Also, if I select Reverse before the car has dropped to 1st, there is a big CLUNK noise coming from the transmission.

Why does this happen? I cant seem to find any plausible answers on Google or any other source. Also, the car missfires a little bit in its first start in the morning.


Thanks guys!
I am not sure but it Seems like its a transmission problem. Does it ever happen when you are on stock map? Does it happen when the car is cold more importantly when the transmission is still cold and things go back to normal after you've driven the car for a while? if so then i guess the valve body/tcu has a problem, i think its best to check if the transmission has stored any faults. Again i might be wrong just asking for clarifications.
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      02-25-2014, 07:33 PM   #8384
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Quote:
Originally Posted by lfpontes View Post
HELP!

Hello,

I own a 335i E90 N54 auto here in Brazil.. It has AMS DP, K&N inbox, COBB, and AA BOV .

Everytime I change my current map with the cobb system, the car seems to be stuck in 2nd or 3rd gear for a while, and suddenly it drops to 1st after a few ft of driving and everything stays normal.
This only happens right after I switch the map, when I turn on the car. And only one time every time the map is switched.

Also, if I select Reverse before the car has dropped to 1st, there is a big CLUNK noise coming from the transmission.

Why does this happen? I cant seem to find any plausible answers on Google or any other source. Also, the car missfires a little bit in its first start in the morning.


Thanks guys!
Sounds normal for somebody with Cobb and Alpina TCU flash. I have it too and that is how it behaves. It goes away and acts fine in a few minutes.
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      02-26-2014, 06:49 AM   #8385
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Also, someone mentioned here about a certain Turbo lag witht eh Cobb Stock maps, and that definently happens with my car.
Drove a friendīs 335i with a custom map, but considered Stage 1, and it was a LOT stronger down the rev band, while my car only wakes up mid-top the rev band.
It does not even feel like a TT car with that behaviour.

Is that normal for cobb map?
Im running Stage 2 agressive Without FMIC.
My car has the Alpina TCU, Downpipes, and BOV/chargepipe.

Any input on that would be very helpful!

Is there a way to download new Cobb maps, sort of updated ones?

Thanks!
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      02-26-2014, 12:09 PM   #8386
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Quote:
Originally Posted by lfpontes View Post
Also, someone mentioned here about a certain Turbo lag witht eh Cobb Stock maps, and that definently happens with my car.
Drove a friendīs 335i with a custom map, but considered Stage 1, and it was a LOT stronger down the rev band, while my car only wakes up mid-top the rev band.
It does not even feel like a TT car with that behaviour.

Is that normal for cobb map?
Im running Stage 2 agressive Without FMIC.
My car has the Alpina TCU, Downpipes, and BOV/chargepipe.

Any input on that would be very helpful!

Is there a way to download new Cobb maps, sort of updated ones?

Thanks!
Look at logs... There's a good chance that the car is still on boost & more powerful, it just feels (which is very subjective) "not as powerful". There's also a possibility that the PROtuner your friend used doesn't like to use lots of boost downlow, which logs once again would prove.

Not for nothing, it shouldn't be surprising that more lag exists vs. the OEM tune which peaks at 8-9 psi, when I believe even the Stage 1 Maps go to ~12 psi. You've raised the target, it will naturally take a little longer. By no means the N54 with stock turbos is laggy though, cause if you think it is just go for a ride in a big turbo EVO that probably won't go on boost until 5K.
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      02-26-2014, 12:30 PM   #8387
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I understand, I own a Porsche 930 Turbo with Black Forest Racing engine, strocked to 3.5 liters and 1.5 kg boost on the bigger Turbo, while the stock car peaks at 0.8.
Now thats what I call a Turbo lag. Up until 4, 4.5K RPM, there no virtually no boost. Then, all hell brakes loose.

How can I measure data log, boost etc on Cobb? I am really a newbie with the system.
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      03-02-2014, 04:42 PM   #8388
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hey guys i have a question! on my log my req boost seems way high but my actual boost seems to be where it needs is this something normal on cobb? its my first log just trying to get a better understanding http://datazap.me/u/chepy24/log-1-ag?log=0&data=1-8-20
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      03-02-2014, 05:09 PM   #8389
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Quote:
Originally Posted by chepy24 View Post
hey guys i have a question! on my log my req boost seems way high but my actual boost seems to be where it needs is this something normal on cobb? its my first log just trying to get a better understanding http://datazap.me/u/chepy24/log-1-ag?log=0&data=1-8-20
There is two different boost measurements taken by the AP. There is absolute PSI which is what the DME uses for boost targets and then there is "boost" which is basically just for display purposes and is dispalyed in PSIg. Which is where your confusion is coming from. Compare boost mean abs and req boost abs NOT boost(psi).

PSIg + atmospheric = absolute PSI

As far as your log is concerned it looks pretty good aside from the boost oscillations you're having down low.
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      03-02-2014, 05:17 PM   #8390
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Quote:
Originally Posted by Allen@PTF View Post
There is two different boost measurements taken by the AP. There is absolute PSI which is what the DME uses for boost targets and then there is "boost" which is basically just for display purposes and is dispalyed in PSIg. Which is where your confusion is coming from. Compare boost mean abs and req boost abs NOT boost(psi).

PSIg + atmospheric = absolute PSI

As far as your log is concerned it looks pretty good aside from the boost oscillations you're having down low.
ohhhhhh ok got it! thanks still learning but that is why i love these forums! on that boost oscillations is that something that is normal? i was told could be wastegates??? iv also heard those can be fixed when i get my custom map is that right?
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      03-02-2014, 05:44 PM   #8391
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Quote:
Originally Posted by chepy24 View Post
ohhhhhh ok got it! thanks still learning but that is why i love these forums! on that boost oscillations is that something that is normal? i was told could be wastegates??? iv also heard those can be fixed when i get my custom map is that right?
In this case it appears it's an issue with the PID tables and should be resolved easily by a good tuner that is familiar with the N54.
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      03-02-2014, 05:46 PM   #8392
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Quote:
Originally Posted by lfpontes View Post
HELP!

Hello,

I own a 335i E90 N54 auto here in Brazil.. It has AMS DP, K&N inbox, COBB, and AA BOV .

Everytime I change my current map with the cobb system, the car seems to be stuck in 2nd or 3rd gear for a while, and suddenly it drops to 1st after a few ft of driving and everything stays normal.
This only happens right after I switch the map, when I turn on the car. And only one time every time the map is switched.

Also, if I select Reverse before the car has dropped to 1st, there is a big CLUNK noise coming from the transmission.

Why does this happen? I cant seem to find any plausible answers on Google or any other source. Also, the car missfires a little bit in its first start in the morning.


Thanks guys!

that clunk is not your transmission. Its your floating brakes ,,,its a common issue with our cars .
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      03-02-2014, 06:55 PM   #8393
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Quote:
Originally Posted by Jeffman View Post
Sounds normal for somebody with Cobb and Alpina TCU flash. I have it too and that is how it behaves. It goes away and acts fine in a few minutes.
I've flashed Cobb maps with a variety of TCU flashes already in place (not just Alpina). I don't have any clunks or anything like that.

However, right after I flash a map and drive off the car seems to stay in 3rd gear until I get going fast enough for it to up shift to 4th. I see this behavior regardless of TCU flash. After it completes the first up shift to 4th then it reverts back to normal shifting behavior from there on out. I have a feeling this is standard behavior right after a new map is flashed. I have an 09 AT x drive.
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      03-02-2014, 07:40 PM   #8394
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Quote:
Originally Posted by lfpontes View Post
How can I measure data log, boost etc on Cobb? I am really a newbie with the system.
Double check the default data log list, but here's a video done by COBB

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      03-07-2014, 08:29 AM   #8395
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Quote:
Originally Posted by mfish123 View Post
I've flashed Cobb maps with a variety of TCU flashes already in place (not just Alpina). I don't have any clunks or anything like that.

However, right after I flash a map and drive off the car seems to stay in 3rd gear until I get going fast enough for it to up shift to 4th. I see this behavior regardless of TCU flash. After it completes the first up shift to 4th then it reverts back to normal shifting behavior from there on out. I have a feeling this is standard behavior right after a new map is flashed. I have an 09 AT x drive.
Thats exactly what happens with my car, and it did occur before I did the TCU flash.
But instead of upshifting to 4th, my car abruptly downshifts to 1st when a higher speed is achieved. After this, everything goes back to normal.

The "clunk" that I heard was exactly after I flashed my ECU, and the car was stuck in 3rd gear, and I had to reverse to be able to leave my driveway.

After I reached a higher speed, everything went back to normal.


I am going to check the data log this weekend. I drove a friendīs 335 with a custom map, and the behaviour of the car is completely different. My car seems stronger at the top end, with a bit of lag down the rev band, while his car maintains the characteristic of the 335, being strong down-mid rev, and loosing a bit top end.
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      03-07-2014, 08:58 AM   #8396
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Just realized this is were I should be posting perhaps my latest data log pulls ... Just a question too I hit default a bunch of times on the v3 in regards to data logs and it was 20 and it won't do more than 16 items to log. Therefore I had to delete 4 and I just guessed on which would be not be necessary. Anyhow once again traffic was a issue but I'm hoping there are one or two pulls that capture it. One thing I will say is if not wot the car feels like it loses a lot of pressure when it shifts gears at mild throttle then it builds and hits but feels like a slight miss right away then , NEW LINK HOPE IT WORKS....

http://datazap.me/u/chromey/3-pulls-...&data=1-2-3-10

Last edited by Chromey; 03-07-2014 at 10:30 AM. Reason: Bad link
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      03-07-2014, 09:10 AM   #8397
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Quote:
Originally Posted by Chromey View Post
Just realized this is were I should be posting perhaps my latest data log pulls ... Just a question too I hit default a bunch of times on the v3 in regards to data logs and it was 20 and it won't do more than 16 items to log. Therefore I had to delete 4 and I just guessed on which would be not be necessary. Anyhow once again traffic was a issue but I'm hoping there are one or two pulls that capture it. One thing I will say is if not wot the car feels like it loses a lot of pressure when it shifts gears at mild throttle then it builds and hits but feels like a slight miss right away then boom boost..

http://datazap.me/u/chromey/3-pulls-...&data=1-2-3-10
The link just takes me to the datazap front page.
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      03-07-2014, 09:14 AM   #8398
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Quote:
Originally Posted by 135Pats View Post
The link just takes me to the datazap front page.
+1
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      03-07-2014, 10:30 AM   #8399
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New link

http://datazap.me/u/chromey/3-pulls-...&data=1-2-3-10
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      03-09-2014, 11:32 PM   #8400
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error

So i recently just bought a used v2 Accessport, flashed my car and then decided to see if any updates were available for ap. After downloading on my laptop the Ap got stuck on "do not disconnect" screen and when trying to reconnect it using accessport manager, it says "unable to find access port". Whats going on? It has been like this all day and won't let me close it or reconnect it.
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      03-10-2014, 07:40 AM   #8401
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Quote:
Originally Posted by Jonnyeg93
So i recently just bought a used v2 Accessport, flashed my car and then decided to see if any updates were available for ap. After downloading on my laptop the Ap got stuck on "do not disconnect" screen and when trying to reconnect it using accessport manager, it says "unable to find access port". Whats going on? It has been like this all day and won't let me close it or reconnect it.
What system, Mac or windows?

I had similar issue using OSX, hooked it up to windows and it straightened itself out.

Highly recommended using windows when updating the AP.
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      03-12-2014, 09:23 AM   #8402
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Is anyone still running v203?

I've searched like crazy, but I can't find a meaningful description of what's changed compared to the v401.

Can someone sum it up?
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      03-12-2014, 09:39 AM   #8403
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Quote:
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Is anyone still running v203?

I've searched like crazy, but I can't find a meaningful description of what's changed compared to the v401.

Can someone sum it up?
Whoa thatís an old revision. V403 maps have significantly revised duty cycle tables, 3D scalar ability depending on fuel, revised VANOS mapping for better response, Iíve found fuel usually comes on a bit earlier and the maps target a bit richer, Iím sure there are numerous other changes. When Cobb does a wholesale revision, itís usually for good reason. The boost curve for one is much smoother than the V3xxx maps. IMO.
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      03-12-2014, 10:26 AM   #8404
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Alright. Thanks for the intel.
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