[Allen@MOTIV]

Originally Posted by chepy24

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.

[dghits26]

Originally Posted by lfpontes

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 .

[mfish123]

Originally Posted by Jeffman

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.

[Mit_Boost]

Originally Posted by lfpontes

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

[lfpontes]

Originally Posted by mfish123

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 friend´s 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.

[Chromey]

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

[135Pats]

Originally Posted by Chromey

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.

[chepy24]

Originally Posted by 135Pats

The link just takes me to the datazap front page.

+1

[Chromey]

New link

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

[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.

[deeLow]

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.

[AWD Addict]

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?

[135Pats]

Originally Posted by AWD Addict

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 that’s an old revision. V403 maps have significantly revised duty cycle tables, 3D scalar ability depending on fuel, revised VANOS mapping for better response, I’ve found fuel usually comes on a bit earlier and the maps target a bit richer, I’m sure there are numerous other changes. When Cobb does a wholesale revision, it’s usually for good reason. The boost curve for one is much smoother than the V3xxx maps. IMO.

[AWD Addict]

Alright. Thanks for the intel.

[rashad.mashtoub]

Guys when I want to switch maps in my bmw 335i from stage 2+fmic to stage 1+fmic let's say do I need to turn off my car ? Plus do u guys think I need to replace my oem charge pipe when using the stage 2+fmic?

Thanks

[e90Mark]

Originally Posted by rashad.mashtoub

Guys when I want to switch maps in my bmw 335i from stage 2+fmic to stage 1+fmic let's say do I need to turn off my car ? Plus do u guys think I need to replace my oem charge pipe when using the stage 2+fmic?

Thanks

OEM charge pipe always has a chance of cracking. It's really up to you.

When you switch maps, you should be an ignition off, engine off state. So yes, turn off your engine. No "on the fly" switching.

[alwayseuro]

So I only looked threw a few pages on this post and could not find my answer. Im sure it was asked already so sorry in advance for asking. Can 2 step be set up on AP v2?

[Ingeniator]

You would need a 2step box or stack a piggyback.

[alwayseuro]

Originally Posted by Ingeniator

You would need a 2step box or stack a piggyback.

Thanks. Going to start looking into it.

[Allen@MOTIV]

Originally Posted by alwayseuro

Thanks. Going to start looking into it.

A WOTbox is your best bet.

[Lawton438]

wondering if anyone could help.

last night my car threw p30ff and went into limp, which i beleive to be a boost leak of somekind. i cleared the code drove it home, and then today had a look for any leaks on the pipework and vac lines. couldnt find any so decided to go do some logs. could some please take a look and see what you think?

thanks much appreciated
http://www.datazap.me/u/lawton438/3r...a=1-2-3-7-8-20

[Jeffman]

Here's the intel on your code:
30FF:
30FF Exhaust fume turbocharger low side
EXPLANATION: ECU boost under ECU target
FIX: Often caused by boost leaks, leaky DVs, broken vacuum lines, etc. Also possibly tuning related. If using a TMAP tune (SSTT/JB+) it may be a sign you need to reduce your boost level, or perform the solenoid bypass.