Knock Retard after 5k rpm (Procede logs inside) - Page 2 - BMW 3-Series (E90 E92) Forum

marv85 · 10-16-2012, 10:16 AM

how about plugs? I was getting timing drops a while back even on stage1 (COBB). Swapped plugs and timing drops were gone

BADS335 · 10-16-2012, 11:15 AM

Quote:

Originally Posted by marv85

how about plugs? I was getting timing drops a while back even on stage1 (COBB). Swapped plugs and timing drops were gone

Plugs are new and I recently went through them because I had a missfire issue so I know those are good.

Is there a way to modify the knock sensor sensitivity?

marv85 · 10-16-2012, 11:22 AM

Quote:

Originally Posted by BADS335

Plugs are new and I recently went through them because I had a missfire issue so I know those are good.

Is there a way to modify the knock sensor sensitivity?

Yup I read about you changing the plugs after I posted and e90post died so couldn't delete...

I don't think so. I know with COBB you can log the knock sensor. that way you can help determine whether the drop was caused by the DME reacting to the knock sensor or not. Why would you want to change the sensitivity though?

BADS335 · 10-16-2012, 11:54 AM

Quote:

Originally Posted by marv85

Yup I read about you changing the plugs after I posted and e90post died so couldn't delete...

I don't think so. I know with COBB you can log the knock sensor. that way you can help determine whether the drop was caused by the DME reacting to the knock sensor or not. Why would you want to change the sensitivity though?

It sometimes helps eliminate false knock from mechanical vibrations and other affects.

marv85 · 10-16-2012, 11:55 AM

Quote:

Originally Posted by BADS335

It sometimes helps eliminate false knock from mechanical vibrations and other affects.

see your point, but since this is not a known issue with this car I still think there is something else going on.

Logical next step in the coils

BADS335 · 10-16-2012, 12:41 PM

Quote:

Originally Posted by marv85

see your point, but since this is not a known issue with this car I still think there is something else going on.

Logical next step in the coils

I already went through the coils.

Dmacc · 10-16-2012, 12:48 PM

How many miles on the injectors?

BADS335 · 10-16-2012, 01:25 PM

Quote:

Originally Posted by Dmacc

How many miles on the injectors?

No idea. They have markings so they were inspected at some point. Car has 48k miles.

marv85 · 10-16-2012, 01:46 PM

Quote:

Originally Posted by BADS335

I already went through the coils.

crap... I'm sorry if this was answered but have you logged the stock tune?

BADS335 · 10-16-2012, 02:02 PM

Quote:

Originally Posted by marv85

crap... I'm sorry if this was answered but have you logged the stock tune?

I have not. I will try. not sure I can with Procede on map 0.

marv85 · 10-16-2012, 03:02 PM

Quote:

Originally Posted by BADS335

I have not. I will try. not sure I can with Procede on map 0.

WEll the thing was procede is stock 0 is a procede map with stock boost level it is not a pass through map.. either way worth the try

BADS335 · 10-16-2012, 03:49 PM

Quote:

Originally Posted by marv85

WEll the thing was procede is stock 0 is a procede map with stock boost level it is not a pass through map.. either way worth the try

This will eliminate detonation as an issue.

uniter · 10-16-2012, 03:57 PM

IIRC It won't log in Map0? I read somewhere you need to trigger an overboost in procede (set a low fail value in user tuning.)

BADS335 · 10-17-2012, 04:07 PM

As uniter stated, can't log. So I made a custom boost map using the same map I have been running. I cut the boost to 9psi at 5k+ and the KR went away. I was surprised. I have also logged 10psi without issues. Going to keep creeping up boost till it triggers again then back it down till it goes away. So I think I found the issue. This is odd to me but perhaps the boost or timing is too aggressive at that RPM. I will keep everyone posted.

marv85 · 10-17-2012, 05:08 PM

Quote:

Originally Posted by BADS335

As uniter stated, can't log. So I made a custom boost map using the same map I have been running. I cut the boost to 9psi at 5k+ and the KR went away. I was surprised. I have also logged 10psi without issues. Going to keep creeping up boost till it triggers again then back it down till it goes away. So I think I found the issue. This is odd to me but perhaps the boost or timing is too aggressive at that RPM. I will keep everyone posted.

how much timing were you to trying to target and what boost?

BADS335 · 10-18-2012, 09:38 AM

I was running stage 2 with a little more bias toward higher boost and timing. In the problem area it was originally targeting 15.35psi at 5k tapering from there and about 6* rising to 10* advance from 5k-6k. Start boost in is set to 50% and IC is set to 70%. It reacts very well in the low-Mid range with these settings and never has an issue until the 5k mark. I am guessing since these settings are global, that it offsets maybe too much in the higher range and may be too aggressive with the additional biasing. I am hoping to find a happy medium in the boost and leave timing alone. Unless someone with more experience chimes in and says back off that timing up top cause its insanely too high haha.

marv85 · 10-18-2012, 11:00 AM

Quote:

Originally Posted by BADS335

I was running stage 2 with a little more bias toward higher boost and timing. In the problem area it was originally targeting 15.35psi at 5k tapering from there and about 6* rising to 10* advance from 5k-6k. Start boost in is set to 50% and IC is set to 70%. It reacts very well in the low-Mid range with these settings and never has an issue until the 5k mark. I am guessing since these settings are global, that it offsets maybe too much in the higher range and may be too aggressive with the additional biasing. I am hoping to find a happy medium in the boost and leave timing alone. Unless someone with more experience chimes in and says back off that timing up top cause its insanely too high haha.

so your requesting 6deg ->10deg from 5k to 6k???

BADS335 · 10-19-2012, 08:30 AM

Quote:

Originally Posted by marv85

so your requesting 6deg ->10deg from 5k to 6k???

That is what the Procede map is requesting, yes. I had to drop some timing in the 5200 area after the last log. Just a small hit this time. Not the crazy 15+* I have been seeing. If it ever stops raining I can log my latest efforts and see what that feels and looks like. I love it when I actually see results from my efforts. This is the fun part of tuning.

BADS335 · 02-20-2013, 03:39 PM

Update, still having issues. Even when it is in the teens outside with low iats. This has to be mechanical. Its too predictable and specific.

10-16-2012, 10:16 AM	#23
marv85 Colonel Drives: '07 335i MT Join Date: Jun 2010 Location: Portland Posts: 2,501 iTrader: (4)	how about plugs? I was getting timing drops a while back even on stage1 (COBB). Swapped plugs and timing drops were gone __________________ '10 E92 335i , COBB

10-16-2012, 12:48 PM	#29
Dmacc Lieutenant Colonel Drives: 2010 135i Join Date: Mar 2010 Location: Nor Cal Posts: 1,865 iTrader: (1)	How many miles on the injectors? __________________ thanks to MGallop

10-16-2012, 03:57 PM	#35
uniter Black on Black on Black. Drives: 335i/6mt Sport,Nav,Prem. Join Date: Feb 2010 Location: New Hope, PA Posts: 364 iTrader: (1)	IIRC It won't log in Map0? I read somewhere you need to trigger an overboost in procede (set a low fail value in user tuning.) __________________ LEMANS BLUE M-TECH E92->PROCEDE REV3::ETS 7" FMIC::RACELAND DPS::WAVETRAC DIFF::DEFIV DIFF LOCKDOWN::DEFIV OCC::DEFIV INTAKE::RB PCV

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10-17-2012, 04:07 PM	#36
BADS335 Second Lieutenant Drives: Montego 335i E90 Join Date: Sep 2010 Location: Chicago Posts: 256 iTrader: (1)	As uniter stated, can't log. So I made a custom boost map using the same map I have been running. I cut the boost to 9psi at 5k+ and the KR went away. I was surprised. I have also logged 10psi without issues. Going to keep creeping up boost till it triggers again then back it down till it goes away. So I think I found the issue. This is odd to me but perhaps the boost or timing is too aggressive at that RPM. I will keep everyone posted.

10-18-2012, 09:38 AM	#38
BADS335 Second Lieutenant Drives: Montego 335i E90 Join Date: Sep 2010 Location: Chicago Posts: 256 iTrader: (1)	I was running stage 2 with a little more bias toward higher boost and timing. In the problem area it was originally targeting 15.35psi at 5k tapering from there and about 6* rising to 10* advance from 5k-6k. Start boost in is set to 50% and IC is set to 70%. It reacts very well in the low-Mid range with these settings and never has an issue until the 5k mark. I am guessing since these settings are global, that it offsets maybe too much in the higher range and may be too aggressive with the additional biasing. I am hoping to find a happy medium in the boost and leave timing alone. Unless someone with more experience chimes in and says back off that timing up top cause its insanely too high haha.

02-20-2013, 03:39 PM	#41
BADS335 Second Lieutenant Drives: Montego 335i E90 Join Date: Sep 2010 Location: Chicago Posts: 256 iTrader: (1)	Update, still having issues. Even when it is in the teens outside with low iats. This has to be mechanical. Its too predictable and specific.