All COBB Tuning AccessPORT for 135i Discussion Here

[COBB Tuning]

Hey guys, we understand your concerns as it pertains to your warranty and denied claims. We have done some testing with some of our friends at a local BMW dealership and we have found that if you uninstall the AccessPORT completely, the technicians could not find any trace of a previous flash, even knowing that one had been present. They went looking for it, so to speak and could not find any evidence of there being any tampering with the ECU.

I am researching some of the other concerns you guys have and will post back with more info!

[NYC6]

COBB looks like an attractive option to be sure but I'll sit on the fence waiting to see if its a sure thing that BMW cannot pick up a flash anywhere in the system.
A few 'friends" testing it at this time is not good enough for me. Have 3 years left on my warranty and cant afford to have that go down the drain.

[machewbacca]

understandable, but for me, the performance gains on a stock car outweigh the risks of possibly losing my warranty. I've had the car in for the HPFP recall and had no issues. cobb ap is highly recommended.

[Wilks]

Even if they detect a flash they can't void the warranty completely - they have to prove the flash caused the specific part to fail. I think some people on this thread are being overly sensitive. I ran a GIAC flash on a 2.0 FSI car from 200 miles and traded it in at 41000 miles. I was up front with the dealer and as an example they warrantied a diverter valve. I know for a fact a large BMW dealer near me is doing/ has done the recall HPFP no questions asked on cars they know are flashed. I dont get all the hysteria. If you want more power get a Cobb, GIAC or ESS flash. If you are too scared to do it no need to whine on this thread. Stick to your 300 horses and don't complain when a tuned N54 blows by you.....

[NYC6]

Originally Posted by machewbacca

understandable, but for me, the performance gains on a stock car outweigh the risks of possibly losing my warranty. I've had the car in for the HPFP recall and had no issues. cobb ap is highly recommended.

You weighed the info and decided that in your case its a risk you can and are willing to take. Everyone has to figure out for themselves. My 135 is my DD, I have a S/C's C6 Vette for weekend duty. For now, thats where most of my mod money goes. Down the road some I will do a hp/tq bump to the 1 but in no hurry.

BMW not doing a complete search of the electronics on your car for a HPFP(thousands of them) doesnt impress me. Lets see how deep they look if you hole a piston or throw a rod.

[RX-BMW]

So after the last firmware update and flashing 93 octane map v201, cruise control does not work. Also, when I go to "see current map", is it supposed to say "reflash stage1 93oct v201?"

[Lambobimmer]

Originally Posted by RX-BMW

So after the last firmware update and flashing 93 octane map v201, cruise control does not work. Also, when I go to "see current map", is it supposed to say "reflash stage1 93oct v201?"

Cruise has never worked. Cobb mentioned it in another post that they are aware of the problem and that they are working on it.

[bryce]

Originally Posted by bryce

i'm curious about the boost control/overshooting boost scenarios. it seems to me like actual wastegate control is a more ideal boost management protocol, but i haven't fully researched cobb's methods. if i'm overlooking posts in this thread or e90post, i apologize....there's definitely a lot to sift through.

cobb-

any comment on torque-targeting versus actual wastegate control? thanks in advance

[RX-BMW]

Originally Posted by lamboworld

Cruise has never worked. Cobb mentioned it in another post that they are aware of the problem and that they are working on it.

I gotcha, thought that i saw on COBB forums that they fixed it.

[packetpilot]

I flashed my car (with a beta from the 2/2 update) this past Friday and drove it pretty heavily over the weekend. While I'm very happy with the performance of the car, I noticed two things that keep me from being 100% satisfied and I'd like to see if anyone else has experienced them:

- Actual and Requested TPS, despite very light and steady depression (perhaps around values of 30%) read, for short bursts at 81 (WOT, as far as I know).

- At lower RPMs, acceleration at WOT or near WOT would cause the car to vibrate/lightly shudder, most noticeable in 5th/6th gear around speeds of 50/60 MPH respectively. It was quite faint, but I could definitely feel it in my butt.

Has anyone else noticed either or both of these behaviors? Please state if you have a beta flash or not.

[theboogieman1]

Originally Posted by thisisdave

I flashed my car (with a beta from the 2/2 update) this past Friday and drove it pretty heavily over the weekend. While I'm very happy with the performance of the car, I noticed two things that keep me from being 100% satisfied and I'd like to see if anyone else has experienced them:

- Actual and Requested TPS, despite very light and steady depression (perhaps around values of 30%) read, for short bursts at 81 (WOT, as far as I know).

- At lower RPMs, acceleration at WOT or near WOT would cause the car to vibrate/lightly shudder, most noticeable in 5th/6th gear around speeds of 50/60 MPH respectively. It was quite faint, but I could definitely feel it in my butt.

Has anyone else noticed either or both of these behaviors? Please state if you have a beta flash or not.

I have not felt that on this tune but did on the GIAC stage 1. It's very slight and almost feels like misfires but not bad enough. I will have to run my car a little more to see if this happens with the Cobb. With the GIAC It happened to me in 4th and up when WOT. I was talking to some people and they thought it could be a sign of the HPFP having issues or injectors going bad. I'm just about due for a service so I'm going to have them look into that as an option and see whats up. I have also been having some times where it takes the car a little more than normal to start. I'll update if I find anything on my end.

[nordique14]

I wonder if it is the same problem that is happening with the Dinan tune? Seems that all tunes might be doing roughly the same things so they end up with the same problems. Here is an explanation from a different forum.

At the September Autox there were several of us who noticed that the red Dinan and one other 135i were making an unusual pulsing as it accelerated on some of the longer straighter stretches.

I went to the Dinan open house on Saturday and saw the same car on the Dyno (putting out 350 hp!) and doing the same oscillation. So naturally I asked why. Here is the explanation. They are still using the PID control loop (if you don't know what that is just google it and you will get tons of explanations) from the factory and it's the waste gate "seeing" boost and then "not seeing" boost and basically pulsing the waste gate causing the oscillation. There is an actually pulsing in the output as well seeing the dyno output the pulses are visible as drops in the cars output.

[Lord Cuckoo]

Is there a limit to the number of times the ECU can be flashed on a 4/2007 build e60 535i? For example, every time you uninstall the tune before a service visit you're basically flashing the old software back onto the ECU and when you reinstall the tune after the service you have to flash the ECU again. The reason why I ask is because the e39 M5 DME could only be flashed 8 times before it locked out additional flashes.

Also, you stated that the 2007 335i is currently not supported... Do you mean MY2007 or are you referring to 2007 build date?

Thanks

[packetpilot]

Originally Posted by nordique14

I wonder if it is the same problem that is happening with the Dinan tune? Seems that all tunes might be doing roughly the same things so they end up with the same problems. Here is an explanation from a different forum.

Thanks Nordique; I suppose a very rapid oscillation could be felt as a light 'grinding' or shudder that I'm experiencing. It's good to know that it's not simply isolate with a Cobb tune, but I'd hope that it isn't by design.

More pressingly, though, I'm wondering if other AP tuners have experienced this TPS readout of 81 (max) when the accelerator is nowhere near WOT (in terms of physical position). Judging by the way the car feels, the engine sure is acting like I'm at WOT while the readout displays 81 (and, just to reiterate, the pedal's only around 25-33% depressed). I'm very worried about what this may do to my gas mileage, as I'm practically mashing on the accelerator without even depressing the pedal...

[bmxcamel]

Originally Posted by thisisdave

More pressingly, though, I'm wondering if other AP tuners have experienced this TPS readout of 81 (max) when the accelerator is nowhere near WOT (in terms of physical position). Judging by the way the car feels, the engine sure is acting like I'm at WOT while the readout displays 81 (and, just to reiterate, the pedal's only around 25-33% depressed). I'm very worried about what this may do to my gas mileage, as I'm practically mashing on the accelerator without even depressing the pedal...

I've felt this issue, but much more so with the v201 map than the v200 map. I asked about this in the E9X forum, and cobb replied saying the v200 and v201 maps should be exactly the same so far as tuning goes.

What maps are you guys running when you get the TPS 81 reading? I might go check this out myself later.

[packetpilot]

It must be the newest one (I'm guessing) because in order for me to get the flash, I had to get the beta firmware. I'm uncertain because I'm at the office right now (and don't drive to work).

[Rob@Cobb]

Originally Posted by thisisdave

Thanks Nordique; I suppose a very rapid oscillation could be felt as a light 'grinding' or shudder that I'm experiencing. It's good to know that it's not simply isolate with a Cobb tune, but I'd hope that it isn't by design.

More pressingly, though, I'm wondering if other AP tuners have experienced this TPS readout of 81 (max) when the accelerator is nowhere near WOT (in terms of physical position). Judging by the way the car feels, the engine sure is acting like I'm at WOT while the readout displays 81 (and, just to reiterate, the pedal's only around 25-33% depressed). I'm very worried about what this may do to my gas mileage, as I'm practically mashing on the accelerator without even depressing the pedal...

Hello,

Would you be able to gather a log of when the shutter is happing? I'm curious what that may be.

Seeing 81% TPS at WOT throttle is normal. Can you also data log the 25-33% peddle positions equating to max TPS for me? A suggestion I may have is to flash on Stage 0 and see what kind of TPS values you get a low peddle positions. The tune is more aggressive than stock which requires less throttle input to make the same power.

Feel free to keep the questions coming.

Cheers,
Rob

[RX-BMW]

So for my earlier question, when i go to 'see current map' on the AP while connected to the car, is it supposed to say "Reflash 93 oct stage 1 v.201" ??

Thanks

[Rob@Cobb]

Originally Posted by RX-BMW

So for my earlier question, when i go to 'see current map' on the AP while connected to the car, is it supposed to say "Reflash 93 oct stage 1 v.201" ??

Thanks

Correct. What ROM revision do you have?

Cheers,
Rob

[RX-BMW]

1.6.3.2-1303 for Beta firmware. and ROM v.201 (car is an automatic too)

[RX-BMW]

And I didnt notice the lack of cruise control until recently haha

[packetpilot]

Originally Posted by Rob@Cobb

Hello,

Would you be able to gather a log of when the shutter is happing? I'm curious what that may be.

Seeing 81% TPS at WOT throttle is normal. Can you also data log the 25-33% peddle positions equating to max TPS for me? A suggestion I may have is to flash on Stage 0 and see what kind of TPS values you get a low peddle positions. The tune is more aggressive than stock which requires less throttle input to make the same power.

Feel free to keep the questions coming.

Cheers,
Rob

Thanks Rob. I'll definitely do some data logging for you once I get behind the wheel again (unfortunately not likely until Friday afternoon) for logging with the shudder. I look forward to doing all I can as an early adopter to help out.