[Motastic]

Finally got my VRSF DP's installed today. First off great fitment and good pipes for the price.

Now on to the second problem. I have COBB Stage 2 Aggressive installed on the car and it just feels like its sluggish in the first gear. I am on V301. I felt that when I was no Stage 1, it was more responding from the get go but now it just feels like the first gear its struggling.

Is that normal or just map's are wrong? I always thought aggressive are the maps that give the most "push" in the seat.

Also seems like car is running a little hotter, around 240, is that normal?

Lastly, do I need to do anything for the DP fix or anything with the COBB

UPDATE: These are the error codes that I am throwing after driving car and service engine soon light is on. P2C2B, P29E1, P2C24

[rader1]

To answer any of your questions about performance with any accuracy we need to see logs to be sure everything is working as it should.

As far as the DP fix: are you talking about passing emissions or just getting rid of the CEL.

[Motastic]

CEL, well I mean i have no cel on the dash, I plugged all the sensors back into the DP's though

[Motastic]

Also this is pretty stupid but on the COBB how do I log? What all do I log and than how do I upload it

Sorry for the n00b question on that

[RevC]

i'm a procede guy ( gee i wonder if its because SO many people have issues with the bmw cobb) i am almost certain its because you are on v301, horror. but i think i can help you out as i use one in my STI. have you tried the beta v4.01 maps? it was supposed to be fix the issues some members got with underboosting,
you can log right through the unit itself, goto monitor, and second option data log. can also set whichever parameters you want to log- RPM
Boost
TPS
PWM/DC
Ignition
IAT
Fuel/AFR
basically, boost, target boost, timing advance, AFR, and RPM, usually are suffice . do some 3rd gear pulls from 2k..

iirc, on cobb logs on e9x you will see and want to log
RPM
WGDC
ALL CYL (1-6)
IAT
LOAD Act
lOAD req
boost
afr 1/2
throttle(tps)
timing

export the saved csv file and we can take a look..

here's a noteworthy read, it will help you out. http://www.cobbtuning.com/v/vspfiles...FinalAlpha.pdf

[rader1]

If you just wan't to get rid of the check engine light then all you have to do is run stage 2 or stage 2+.

As far as logging: Select what channels you want to log. I do RPM, throttle position, timing cyl 1-6(you PROcede guys don't know nothing bout that), charge air temp, lambda 1&2, WGDC, load req&act, and boost.
Then find a safe, empty stretch of highway and do either a 2-3 gear pull or 3-4 gear. I do 2-3 because of safety reasons.
Select monitor->datalog and start logging right before you go WOT.

Then hook up the AP to your PC and export the files. Use excel or virtual dyno to graph the logs and post em to get some reviews.

Ohh, and I've got nearly 20K miles of trouble free EXCELLENT performance from Cobb.

[skim7x]

Originally Posted by Motastic

Now on to the second problem. I have COBB Stage 2 Aggressive installed on the car and it just feels like its sluggish in the first gear. I am on V301. I felt that when I was no Stage 1, it was more responding from the get go but now it just feels like the first gear its struggling.

Is that normal or just map's are wrong? I always thought aggressive are the maps that give the most "push" in the seat.

Also seems like car is running a little hotter, around 240, is that normal?

Lastly, do I need to do anything for the DP fix or anything with the COBB?

1. Log, as detailed above.

2. Use v401 maps

3. Make sure you're using stock throttle maps, not linear (it seems you would prefer ST maps)

4. 240F I believe is fine. The car is making more power, so you'll have more heat. It shouldn't go above 250F

5. Cobb will suppress the codes for your cattless DP's. However, if you want to pass emissions, you will need the BMS DP Fix to pass readiness.

[Motastic]

Well after driving the car around for a while, i plugged in the cobb and got the following codes P2C2B, P29E1, P2C24

also i realized its not so much the cobb but it seems like the car when first turn it on, it sputters or hesitates, feels like after a few seconds, is about to turn off. Same as far as pwoer goes seems like it really has to build up before it goes

do the codes have something to do with it?

[marv85]

Originally Posted by Motastic

Well after driving the car around for a while, i plugged in the cobb and got the following codes P2C2B, P29E1, P2C24

also i realized its not so much the cobb but it seems like the car when first turn it on, it sputters or hesitates, feels like after a few seconds, is about to turn off. Same as far as pwoer goes seems like it really has to build up before it goes

do the codes have something to do with it?

P2C24 is Lamba probe code. I don't think it's a coincidence you got this code after DP install. Did you make sure to put the sensors in the right pipes. If you plug in the sensors in the wrong pipes, you will definitely experience roughness.

[woptang22]

Originally Posted by marv85

P2C24 is Lamba probe code. I don't think it's a coincidence you got this code after DP install. Did you make sure to put the sensors in the right pipes. If you plug in the sensors in the wrong pipes, you will definitely experience roughness.

hey marwan, out of curiosity, do the lambda codes have to do with the O2 sensors being bad, or in the wrong O2 sensor location?

[335i-boy]

Originally Posted by RevC

i'm a procede guy ( gee i wonder if its because SO many people have issues with the bmw cobb) i am almost certain its because you are on v301, horror. but i think i can help you out as i use one in my STI. have you tried the beta v4.01 maps? it was supposed to be fix the issues some members got with underboosting,

Sorry for taking the thread OT guys.

Rev, I am trying to send you a PM. Your inbox is full. Looking for some information that I thought you may be able to help with me.

[rader1]

Originally Posted by woptang22

hey marwan, out of curiosity, do the lambda codes have to do with the O2 sensors being bad, or in the wrong O2 sensor location?

IIRC it means the O2 sensors are in the wrong DP, which would explain the OP's problems.

[woptang22]

Originally Posted by rader1

IIRC it means the O2 sensors are in the wrong DP, which would explain the OP's problems.

thank you for the explanation. Just curious as to I am thinking about getting VRSF DPs so I cant use the COBB stage 2+FMIC. Just dont want to deal with emissions issues in PA which are a pain. But the extra bit of power and sound from DPs would be nice.

[rader1]

Stage 2+FMIC is a VERY fun map. It would probably be worth swapping the DPs out once a year for inspection(if it's visual) or getting the BMS DP fix if it's just OBD2 readiness.

[dfv2]

You did something wrong with the O2 placement. Fix your mechanical mistake(s).

If you're hesitant about emissions on catless downpipes, Stg1+ makes identical power and torque to 5krmp. The Stg2+ maps really don't take advantage of the flow in their current form, I'm still patiently waiting for a protuner to take their skirt off and protune an FBO car.

[marv85]

Originally Posted by woptang22

hey marwan, out of curiosity, do the lambda codes have to do with the O2 sensors being bad, or in the wrong O2 sensor location?

Originally Posted by rader1

IIRC it means the O2 sensors are in the wrong DP, which would explain the OP's problems.

+1, and this can be easily avoided by just numbering the sensors when you remove the,. Nothing to worry about really

[Motastic]

I guess I should have labeled them. So just switch the o2 sensors back and everything should be normal?

[marv85]

Originally Posted by Motastic

I guess I should have labeled them. So just switch the o2 sensors back and everything should be normal?

if that is your problem which I think it is, yes everything should be back to normal

[marcvtec]

Why does cobb always make codes ?

[bulldog_yyc]

Originally Posted by marcvtec

Why does cobb always make codes ?

if you install the o2 sensors in the wrong locations, you will get codes regardless of the tune

[marv85]

Originally Posted by marcvtec

Why does cobb always make codes ?

COBB doesn't when your car is in good shape and when you're running non-beta maps. Plus COBB does not have an auto clear function.

I've been running problem free for the past 25k.

[skim7x]

Originally Posted by marcvtec

Why does cobb always make codes ?

LOL... so wrong on so many levels...