[jimk]

Originally Posted by O HELLA BMW

so i uninstalled the cobb ap last night and i used the ap to clear the SES light and it went away but my car doesnt seem to get any boost. is it b/c i was so used to the POWER of the cobb and my car just feels slow?

when i hit my auto stick to the left into DS mode my car seems to accelerate normally but when i just drive in automatic mode my car seems to struggle to accelerate ??

You had two codes that you indicated in your previous post:


P2401: Evaporative Emission System Leak Detection Pump Control Circuit Low

P2A13: DMTL diagnosis module tank leakage,
leakage diagnosis pump, input signal

Doing a google search reveals some useful information:

The DMTL pump is a self diagnostic tool used to test the fuel tank and evap system for a good seal. It activates under certain situations (fuel tank over 1/4, tank pressure less than xx, stuff like that). What the code suggests is that there is not necessarily a problem with the pump itself (which is actually common on these) but with the circuit that controls it. When the ECU commands the pump on, it looks at tank pressure sensors to determine whether or not the pump is working. If it doesn't see any pressure at all, it flags a code (the code you have) for an activation problem. If the pump was faulty, usually the code would just say faulty pump or something similar because the pumps usually still pressurize a slight bit. Sorry for the novel but to answere your question, a DMTL pump is possibly at fault but the circuit needs to be checked first.


P2401 is probably the DMTL pump , you need to run a tank leak test ( only capable with a GT1 , carsoft , or Inpa ) .DMTL pumps fail ALOT and cause the evap system to set a fault code for evap leak.

Hope the above help. I would make sure that you have reverted back to your stock flash and take it to the dealer if the codes come back. Also, make sure your gas cap is fully tighten. I don't know how this could be tune related but it may be possible, I guess.

GL,
Jim

[O HELLA BMW]

^thanks bro! yea i uninstalled my cobb b/c my car real slow now lol.

i just need to find someone with a BT tool so i can clear all the codes or shadow codes that may still be in my car. then ill take it to the dealer

[jimk]

Originally Posted by O HELLA BMW

^thanks bro! yea i uninstalled my cobb b/c my car real slow now lol.

i just need to find someone with a BT tool so i can clear all the codes or shadow codes that may still be in my car. then ill take it to the dealer

You don't have to run the Cobb flash to read and clear codes with the AP. There is no need for the BT tool. Just plug it in and read/clear the codes.

[O HELLA BMW]

^YEA I KNO i did that with my cobb when i uninstalled it and i did the troubleshooting and there were no codes, but i heard with any tunes they may leave shadow codes that i need deleted

[jimk]

^Understood. It doesn't hurt to be xtra careful.

GL.

[Clap135]

Pretty sure everytime youflash/switch maps/uninstall all codes are removed as the ecu data is wiped clean.

[O HELLA BMW]

^even the shadow codes?

[Boostin335]

on 202 is there a 93 oct map that is in between DS and D... like 1 that is 50/50?

[Alan l.]

Question for Cobb

Is there any limits set with the AP flash where it would limit the max boost that any given car would hit? Since the AP is load base just like stock, the boost required to achieve that load will vary based on numerous factors one being IAT which has a direct impact from the weather. Is there anything behind the scenes as a safety measure that would limit max boost if certain values is exceeded? (high intake temps, oil temps, coolant temps, low fuel pressure etc...)

I can't even imagine on a 90+ humid day being stuck in traffic what boost numbers this tune calls for to reach its load targets...

Alan

[jimk]

Originally Posted by Alan l.

Question for Cobb

Is there any limits set with the AP flash where it would limit the max boost that any given car would hit? Since the AP is load base just like stock, the boost required to achieve that load will vary based on numerous factors one being IAT which has a direct impact from the weather. Is there anything behind the scenes as a safety measure that would limit max boost if certain values is exceeded? (high intake temps, oil temps, coolant temps, low fuel pressure etc...)

I can't even imagine on a 90+ humid day being stuck in traffic what boost numbers this tune calls for to reach its load targets...

Alan

+1

I would like to add another variable which is altitude to this equation too. When driving in high altitudes we know that the turbos are already working harder than usual. Is there a safe limit imposed when Cobb tuning is used to make sure we don't spin the turbos off their shaft in order to produce enough psi to meed the load requirements?

[hj058]

i am having the same issue as you and so is my friend. The only response i have got from Cobb is asking what year my car is. I hope they can find a solution for this issue.

Originally Posted by ccbad

Hey guys,

I updated the firmware of my AP last night. Then I went to uninstall the flash from my car before installing the new maps. Right about when the flash back to stock was going to finish, I got an error saying it couldn't complete the flash. Now the AP was in recovery mode. I followed the instructions to get out of recovery mode, but it said that my car wasn't pair to the AP anymore. Fortunately, my car started and ran fine while having this issue. It did have a Service Engine Soon light, but it eventually went away after a few drives.

I've emailed, called, and tried leaving a PM to Cobb today but haven't gotten any responses back from them yet. I was wondering if this has happened to any of you guys or if you guys had any suggestions on getting the AP out of recovery mode.

Thanks

[Zeph]

It is because of load targetting that an FMIC is crucial (IMO) for running this tune. People seeing upwards of 17psi on a stock car just can't be that good...

On that note, I do have MS stage 1 intake (filter + scoops) which probably doesn't really make much of a difference, but I also have the AMS FMIC. I have driven from Birmingham, AL to Orlando, FL and back already (when I was on COBB AP 2.01) with 90 degree temps and I have had 0 problems with the car. I floor it often just to feel the rush! I am now running 2.02 std with still no problems.

Just because you can do something doesn't make it a good idea. Without an FMIC, I would probably atleast reduce my tune to 91 octane, even though I have 93. I only ran an SSTT on my stock car, and it would even get sluggish (IAT's probably) in hotter temperatures.

[Zeph]

FYI I also have the Synapse BOV kit (love it btw!) but once again, I wouldn't want to run upwards of 17psi on the stock diverters... plastic + rubber = lol at higher psi's

[materialdistractions]

Originally Posted by hj058

i am having the same issue as you and so is my friend. The only response i have got from Cobb is asking what year my car is. I hope they can find a solution for this issue.

I was told by one of their guys to update my AP to the latest beta firmware. Unfortunately that didn't either. Rob from Cobb said I probably will have to send it in to get the AP fixed. So, I'm going to try and call them today to get this resolved. There were a couple of other 07 owners having this issue also. I'll keep you posted.

[dzenno]

Can in tank pump fuel pressure (not hpfp) and EGTs be added to logging on the AP?

[hj058]

Originally Posted by ccbad

I was told by one of their guys to update my AP to the latest beta firmware. Unfortunately that didn't either. Rob from Cobb said I probably will have to send it in to get the AP fixed. So, I'm going to try and call them today to get this resolved. There were a couple of other 07 owners having this issue also. I'll keep you posted.

thanks man i appreciate that. I have another friend also with a 07 that is having the same problem, and so far we are not getting much information from Cobb so it would be great for you to update us as we hope to solve this problem sooner too

[materialdistractions]

Originally Posted by hj058

thanks man i appreciate that. I have another friend also with a 07 that is having the same problem, and so far we are not getting much information from Cobb so it would be great for you to update us as we hope to solve this problem sooner too

I called Cobb this morning and they gave me a ticket number and told me to send it in. Hopefully it will be a quick turnaround because I'm really missing my AP. I suggest calling Cobb and sending your AP in also. Having mods and no tune is boring.

[hj058]

Originally Posted by ccbad

I called Cobb this morning and they gave me a ticket number and told me to send it in. Hopefully it will be a quick turnaround because I'm really missing my AP. I suggest calling Cobb and sending your AP in also. Having mods and no tune is boring.

That's good to know I will for sure give them a call as well

[Mlevin2]

Just wanted to get your guys opinion with whether i should go with a Cobb AP or not. First let me start my saying i had a bad experience prior with messing with a cars ECU. I had a Jetta 1.8t and decieded to get a Neuspeed P-chip, for extra power. The power i was looking for was there, but than again the car was never really the same after that. For example i would encounter random fluttering of the RPM's at stop lights, SES type lights flashing all the time, and sometimes the car just woundnt even start! So as soon as i got my 2008 BMW 335xi i told myself that i wasnt going to touch the engine, and that the car was quick enough....Now obviously im curious. Is it worth the risk??

[mithiral67]

Originally Posted by Mlevin2

Just wanted to get your guys opinion with whether i should go with a Cobb AP or not. First let me start my saying i had a bad experience prior with messing with a cars ECU. I had a Jetta 1.8t and decieded to get a Neuspeed P-chip, for extra power. The power i was looking for was there, but than again the car was never really the same after that. For example i would encounter random fluttering of the RPM's at stop lights, SES type lights flashing all the time, and sometimes the car just woundnt even start! So as soon as i got my 2008 BMW 335xi i told myself that i wasnt going to touch the engine, and that the car was quick enough....Now obviously im curious. Is it worth the risk??

you're polling the wrong population.

[hj058]

Originally Posted by ccbad

I called Cobb this morning and they gave me a ticket number and told me to send it in. Hopefully it will be a quick turnaround because I'm really missing my AP. I suggest calling Cobb and sending your AP in also. Having mods and no tune is boring.

Is there anyone specific u talk to? Just thinking maybe I should talk to the same person when I call in. Cobb usually replies customer messages fast but somehow this time I'm getting nothing from them so I'm gonna call them today or tomorrow

[materialdistractions]

Originally Posted by hj058

Is there anyone specific u talk to? Just thinking maybe I should talk to the same person when I call in. Cobb usually replies customer messages fast but somehow this time I'm getting nothing from them so I'm gonna call them today or tomorrow

Unfortunately I don't remember who I talked to yesterday. When I initially called in about my issue, I talked to Chris. Then via PMs, I've talked to Lance, Travis, and Rob. So, I'm guessing there are a few people at Cobb who are aware of this issue.