[RSL]

Uh oh lol

[breakfastreatre]

puttering around town, including idle at the beginning:
http://datazap.me/u/breakfasteatre/s...ta=3-8-9-10-19

2008 135i, n54
ams intercooler, ar catless downpipes, active autowerkes chargepipe and bov.
index 8 injectors

ive been having issues with the car surging in traffic/light throttle. Very frustrating.

parts ive replaced since i recently purchased the car (i knew there would be issues, this is not my dd)

vanos solenoids
plugs
coils
valve cover gasket
primary o2 sensors
walnut blasted

car still surges
read that a dme reset can cure the surging, not sure if mhd resets to the extent that a dealer/inpa can
Flashed back to stock through mhd, seemed to have worked and then a couple minutes later, the surging comes back


any thoughts? currently there is a hairline crack in the valve cover I noticed after i replaced the gasket.

[335e92tx]

Originally Posted by breakfastreatre

puttering around town, including idle at the beginning:
http://datazap.me/u/breakfasteatre/s...ta=3-8-9-10-19

2008 135i, n54
ams intercooler, ar catless downpipes, active autowerkes chargepipe and bov.
index 8 injectors

ive been having issues with the car surging in traffic/light throttle. Very frustrating.

parts ive replaced since i recently purchased the car (i knew there would be issues, this is not my dd)

vanos solenoids
plugs
coils
valve cover gasket
primary o2 sensors
walnut blasted

car still surges
read that a dme reset can cure the surging, not sure if mhd resets to the extent that a dealer/inpa can
Flashed back to stock through mhd, seemed to have worked and then a couple minutes later, the surging comes back


any thoughts? currently there is a hairline crack in the valve cover I noticed after i replaced the gasket.

will still cause surging. Air being admitted past TMAP will make it lean and since they already run at 14.8 AFR, it will make it surge.

Try a steady state speed (3rd or 4th gear). Log accelerator pedal, throttle opening, RPM, boost (vacu), (edit)- also load req and load actual , AFR and STFT and what that shows.

Might need to include vanos but thats after it gets a baseline. Does it do it only when completely warm or also in first few mins? the Bosch dme is effectively closed loop at all times but I dont think short term trims are fully 'weighted' in like the first 5 mins. The motors get to 170 degrees pretty quick so I think thats about the time they are fully CL

[335e92tx]

Originally Posted by breakfastreatre

puttering around town, including idle at the beginning:
http://datazap.me/u/breakfasteatre/s...ta=3-8-9-10-19

2008 135i, n54
ams intercooler, ar catless downpipes, active autowerkes chargepipe and bov.
index 8 injectors

ive been having issues with the car surging in traffic/light throttle. Very frustrating.

parts ive replaced since i recently purchased the car (i knew there would be issues, this is not my dd)

vanos solenoids
plugs
coils
valve cover gasket
primary o2 sensors
walnut blasted

car still surges
read that a dme reset can cure the surging, not sure if mhd resets to the extent that a dealer/inpa can
Flashed back to stock through mhd, seemed to have worked and then a couple minutes later, the surging comes back


any thoughts? currently there is a hairline crack in the valve cover I noticed after i replaced the gasket.

But, I did have a closer look (better eyes this morning - did hurricane cleanup in houston yesterday - and a 200 mile drive on top ).

You did log some good stuff. So was this thing fully warmed up? (I guess it was - I see your oil temp at 216) What was coolant temp? The first portion of your log shows all kinds of deviation between bank 1 and 2 on AFR. bank 1 is way lean but dme is not really adding fuel yet. But then later they are much closer. About 99 secs in, is when it really starts to get a big delta between load request and load actual. and they bounce back and fourth. So what MHD map is this? It only shows 1.6 on the version.

Someone once told me to log VANOS angles to see if the solenoids are changing in reference to intended and actual angles. In the graph you have, where the load reqs and actual began to bounce, it seems the vanos intake angles are changing in correspondence with DME loads.. so I dont think that thats likely the cause, its probably more of a effect.

I would try the DME CPU reset. The method used by MHD does seem to be pretty effective.

edit 2 It does seem the intake vanos angle has some variation to the requested angle by about 5 degrees. I am not sure if that corresponds to your surge. But maybe what I would do after the CPU reset is move the intake and ext vanos solenoids from one bank to the other. See if that makes any difference on surge. Seems like the intake are more likely what would cause that than ext (bc ext doesnt deviate that much between req and actual).

[breakfastreatre]

It's currently stock map, flashed back through mhd.

I'll try swapping the vanos solenoids around. The ones I put in were aftermarket. They looked of good quality but you never know.

I have a steady state log, I just need to get to a computer to put it up

[335e92tx]

You can give the solenoids 12v and they should just about jump out of your hand actuating them. If its not fast and clean it could be getting slower or not move with enough force - not real common for a new solenoid - they either work or they dont normally.

[breakfastreatre]

http://datazap.me/u/breakfasteatre/stock-cruising-4th?log=0&data=3-19

Not sure if this link is going to work. 4th gear steady cruise.

[335e92tx]

Yeah, at is certainly DME induced - if the dme reset doesnt do it then things get real complicated. If it does then thats very interesting too.. please let me know.

[breakfastreatre]

Originally Posted by 335e92tx

Yeah, at is certainly DME induced - if the dme reset doesnt do it then things get real complicated. If it does then thats very interesting too.. please let me know.

What makes you so certain its a dme issue? To me the log looks fucked with the choppyness, but beyond that, i cant interpret the details

[335e92tx]

Originally Posted by breakfastreatre

What makes you so certain its a dme issue? To me the log looks fucked with the choppyness, but beyond that, i cant interpret the details

Mainly the fact that its intermittent (edit well, I guess looking back at your original log the first 90sec or so you did not have it in gear so it was just idling -). If it was hardware it would be much more consistent. It is strange that load req stays so flat when actual load jumps around so much. But the other aspect of it that re-enforces DME induced is all the other metrics track the actual load so closely. All of the DME controlled elements basically mirror the actual load adds/cuts.

So its basically at all rpms from 1500 up ?

And you didn't reset the dme yet correct?

[breakfastreatre]

Originally Posted by 335e92tx

Mainly the fact that its intermittent (edit well, I guess looking back at your original log the first 90sec or so you did not have it in gear so it was just idling -). If it was hardware it would be much more consistent. It is strange that load req stays so flat when actual load jumps around so much. But the other aspect of it that re-enforces DME induced is all the other metrics track the actual load so closely. All of the DME controlled elements basically mirror the actual load adds/cuts.

So its basically at all rpms from 1500 up ?

And you didn't reset the dme yet correct?

Yup, no dme reset yet. Doing the disconnect the negative, pump the brakes won't be effective. Correct? I'll need to have someone with inpa or similar reset it, right?

Although I haven't done it, I'm sure I can produce the surging all the way to redline, as long as I have the throttle input light. Anything more than barely there, the car runs strong with no hesitations.

[335e92tx]

Originally Posted by breakfastreatre

Yup, no dme reset yet. Doing the disconnect the negative, pump the brakes won't be effective. Correct? I'll need to have someone with inpa or similar reset it, right?

Although I haven't done it, I'm sure I can produce the surging all the way to redline, as long as I have the throttle input light. Anything more than barely there, the car runs strong with no hesitations.

Yeah, I thought it was an option for MHD but I guess Im thinkin my BAVtech cable. I know it can be done with that.

[Christian87n]

http://datazap.me/u/christian87n/log-1505615888 (First run)

http://datazap.me/u/christian87n/log...?log=0&data=13 (Second run)

http://datazap.me/u/christian87n/log...?log=0&data=13 (Third run)

2012 335is with DCT. Wagner Comp 2 intercooler, TFT inlet and charge pipe system, VRSF dp, RB external pcv, stock turbos and stock tune. All on third gear to 4th on manual mode with sport active.

I'm having the following codes: 2C32, 29F4, and 29F5. I know the last two are because of my down pipes and stock tune. Just wanted to confirm the first code isn't indication of something else. I believe the throttle closures are due to overboosting but wanted someone to check timing, STFT, and anything that will catch your attention. Two of the logs start from idle. Thanks all!

[335e92tx]

Originally Posted by Christian87n

http://datazap.me/u/christian87n/log-1505615888 (First run)

http://datazap.me/u/christian87n/log...?log=0&data=13 (Second run)

http://datazap.me/u/christian87n/log...?log=0&data=13 (Third run)

2012 335is with DCT. Wagner Comp 2 intercooler, TFT inlet and charge pipe system, VRSF dp, RB external pcv, stock turbos and stock tune. All on third gear to 4th on manual mode with sport active.

I'm having the following codes: 2C32, 29F4, and 29F5. I know the last two are because of my down pipes and stock tune. Just wanted to confirm the first code isn't indication of something else. I believe the throttle closures are due to overboosting but wanted someone to check timing, STFT, and anything that will catch your attention. Two of the logs start from idle. Thanks all!

Well, first off you dont have the defaults selected for cyl knock retard. You have voltages selected. Go back into mhd monitor setup and select defaults.

Now, with a stock IS map, you prob wont see anything abnormal. Its when you start pushing it in the 13-15 psi range that most show up. So, I would say go ahead and jump to S1 map and see do a log that at least has 3 and 4th gear (selecting default will also log what gear you were in - which is currently missing). DCTs are really tricky when it comes to shifts and if you dont get a shift in there you wont know how bad you need a custom tune or if an OTS map wil work.
Your intake air temps are still pretty high.. Im not far from hou but I wasn't see 125+ when rolling yesterday...

[Christian87n]

Originally Posted by 335e92tx

Well, first off you dont have the defaults selected for cyl knock retard. You have voltages selected. Go back into mhd monitor setup and select defaults.

Now, with a stock IS map, you prob wont see anything abnormal. Its when you start pushing it in the 13-15 psi range that most show up. So, I would say go ahead and jump to S1 map and see do a log that at least has 3 and 4th gear (selecting default will also log what gear you were in - which is currently missing). DCTs are really tricky when it comes to shifts and if you dont get a shift in there you wont know how bad you need a custom tune or if an OTS map wil work.
Your intake air temps are still pretty high.. Im not far from hou but I wasn't see 125+ when rolling yesterday...

http://datazap.me/u/christian87n/log...?log=0&data=13



http://datazap.me/u/christian87n/sec...?log=0&data=13

The temps from the first logs were probably heat soak. Don't know why else they'd be that high, but I agree. I will get a custom tune but want to do a few maintenance items first before I get the tune.

New logs: Turned defaults on as suggested. I don't have cyl knock retard as options. Second run is done from a standstill. All mods including tune still the same. Codes are the same. Outside temp is 80, driving back from Houston. Thanks!

[335e92tx]

Originally Posted by Christian87n

http://datazap.me/u/christian87n/log...?log=0&data=13



http://datazap.me/u/christian87n/sec...?log=0&data=13

The temps from the first logs were probably heat soak. Don't know why else they'd be that high, but I agree. I will get a custom tune but want to do a few maintenance items first before I get the tune.

New logs: Turned defaults on as suggested. I don't have cyl knock retard as options. Second run is done from a standstill. All mods including tune still the same. Codes are the same. Outside temp is 80, driving back from Houston. Thanks!

Sorry, my bad - it should have included timing cyl 1-6 when you selected defaults.. but I dont see it. That is what shows individual retards on cyls. I would also make sure you got load request and load actual on. Those are the crucial ones with what you have already set.

IATs are better on this log - right around 100. But, since you do have a stock map loaded, that is why your getting some throttle closer.. You dont need to redo this log just for the timing - but have that turned on when you begin to go to higher maps.

[Christian87n]

Originally Posted by 335e92tx

Sorry, my bad - it should have included timing cyl 1-6 when you selected defaults.. but I dont see it. That is what shows individual retards on cyls. I would also make sure you got load request and load actual on. Those are the crucial ones with what you have already set.

IATs are better on this log - right around 100. But, since you do have a stock map loaded, that is why your getting some throttle closer..

I don't have the individual cylinder options. Just "Timing Cyl 1". I do have the latest MHD update. Any ideas? You've been a big help. I appreciate it!!!

[335e92tx]

Originally Posted by Christian87n

I don't have the individual cylinder options. Just "Timing Cyl 1". I do have the latest MHD update. Any ideas? You've been a big help. I appreciate it!!!

that is a little strange - page 14 of the manual should show what options are avail. Might want to drop maritial an email. My initial thought was that this was an n55 but I dont see how thats possible considering you have an IS.

[dannybeckett]

Hi guys, very quick one.

Anybody got an example of what knock detection looks like in a log? I.e. what the Cyl1-6 timing correction values look like when the ECU is protecting the engine?

Cheers!

Originally Posted by dannybeckett

Hi guys, very quick one.

Anybody got an example of what knock detection looks like in a log? I.e. what the Cyl1-6 timing correction values look like when the ECU is protecting the engine?

Cheers!

What it should look like when ECU is protecting the engine? Negative values.

What it should look like when the ECU doesn't have to step in and protect the engine? Zeros.

[335e92tx]

Originally Posted by dannybeckett

Hi guys, very quick one.

Anybody got an example of what knock detection looks like in a log? I.e. what the Cyl1-6 timing correction values look like when the ECU is protecting the engine?

Cheers!

Factory maps generally dont push timing the same way (at least from what I understand). They do more drastic power cuts via throttle closers and just lowering LOAD target. The bad part is by the time all those protects go back to normal, its taken a while and there goes the spool. Since the ECM is fast acting (as are the sensors), the tuners have moved to just managing timing to help reduce power a bit then go back to making boost. Im hoping someone will correct me if thats a miss-understanding on my part.. And I should also add OTS maps dont push it hard enough to even trip the timing triggers on good gas.. They taper boost to the point it wont approach the limits.

edit

And this is a stock IS map. You can see what happens when it overshoots a target.. DME does all kinds of drastic stuff...

http://www.e90post.com/forums/showpo...postcount=1229

[dannybeckett]

OK cheers guys, that clears things up. The timing intervention is very sharp. Reason why I'm asking is that I've just repaired my own wastegates, installed a large FMIC and DPs and installed MHD low octane map 2+. I've noticed the timing gets pulled on some cylinders sometimes:

https://datazap.me/u/dannybeckett/co...10-11-12-13-24

But everything else looks okay to me. Do you guys recognise the signature of that -3 degree correction on cylinder 4?