All COBB Tuning AccessPORT Flash for N54 335i Discussion Here

max_k20 · 07-11-2012, 10:03 AM

Ok guyz a little issue just popped up. Log of stg 1 agressive are still looking
Fine but from time to time, in any speed above 3rd gear (3rd, 4th, 5th or 6th even) when going part throttle or flooring it from cruising the engine is bogging down and feel like its shaking. Look like misfires to me but no check engine and cant reproduce at will (as normally when trying to reproduce after it happens it goes fine). Could it be heavy boost oscillations causing something like this ? Once again no limp mode, no check engine or stored code and no half engine light. It's starting to get me worried. Also as I cant reproduce at will cant really log whats happening.

Edit : forgot to add it seems to happen at 2500-3000 rpm most time it happens (3 time since flashing to agressive)

BlueBimmer · 07-11-2012, 10:32 AM

Quote:

Originally Posted by enrita

logs look good considering your IAT is very high. the 21 psi is a boost spike during shift, nothing to worry about , is the sustained boost that counts.

Quote:

Originally Posted by rader1

There's isn't really a "normal" IAT value. IAT is Intake Air Temperature and it is determined by ambient temps, humidity, vehicle speed, engine load/power output etc..

There's not much that can be done to reduce IATs, an upgraded FMIC and Methanol is about it. Plugs, filters, oil etc aren't going to have any direct effect.

There's only one tming correction on the 1-2-3 gear pull so that's good. The timing itself is LOW, but that's almost certainly due to the HOT charge air temps.

Thanks Guys - so I take it everything looks fine, it was warm (80 with humidity @ %54) yesterday when I ran these.

rader1 · 07-11-2012, 10:39 AM

Quote:

Originally Posted by BlueBimmer

Thanks Guys - so I take it everything looks fine, it was warm (80 with humidity @ %54) yesterday when I ran these.

yeah, everything looks ok.

rader1 · 07-11-2012, 10:43 AM

Quote:

Originally Posted by max_k20

Ok guyz a little issue just popped up. Log of stg 1 agressive are still looking
Fine but from time to time, in any speed above 3rd gear (3rd, 4th, 5th or 6th even) when going part throttle or flooring it from cruising the engine is bogging down and feel like its shaking. Look like misfires to me but no check engine and cant reproduce at will (as normally when trying to reproduce after it happens it goes fine). Could it be heavy boost oscillations causing something like this ? Once again no limp mode, no check engine or stored code and no half engine light. It's starting to get me worried. Also as I cant reproduce at will cant really log whats happening.

Edit : forgot to add it seems to happen at 2500-3000 rpm most time it happens (3 time since flashing to agressive)

It sounds like it could be boost oscillations. My oscillations are sort of random as well and i can't really predict when they're going to happen to get a good log of them.

Beas · 07-11-2012, 10:47 AM

so, running cobb stage 2, how strong should my BOV be? was going to order a tial valve and noticed they have 2,4,6,10,12 psi valves. what would be good?

rader1 · 07-11-2012, 10:56 AM

Quote:

Originally Posted by Beas

so, running cobb stage 2, how strong should my BOV be? was going to order a tial valve and noticed they have 2,4,6,10,12 psi valves. what would be good?

i would think 6 would be good. IIRC the stock DVs work off of a 6psi pressure differential.

Beas · 07-11-2012, 11:02 AM

ok, cause i think the hks valve is leaking, car wont boost over 4-5 lbs. im wondering if maybe the BOV i have is setup for stock boost, and running the cobb stage 2 is causing it to leak.

getting a loud police siren type noise from the intake side, sounds like a supercharger.

enrita · 07-11-2012, 11:09 AM

Quote:

Originally Posted by rader1

It sounds like it could be boost oscillations. My oscillations are sort of random as well and i can't really predict when they're going to happen to get a good log of them.

all that gone with V402 on my car so just little more patience till the maps are out.

VNeBLOB42 · 07-11-2012, 01:02 PM

Quote:

Originally Posted by enrita

all that gone with V402 on my car so just little more patience till the maps are out.

Quote:

Originally Posted by rader1

It sounds like it could be boost oscillations. My oscillations are sort of random as well and i can't really predict when they're going to happen to get a good log of them.

I just noticed that v402 is available in beta. on the COBB web site.

Stage 1+ and Stage 2+ only.

JStang · 07-11-2012, 01:21 PM

Bear with me here as this is my first time logging. Other than the basics, I don't know what in the hell I'm doing. I had be running the V402 alpha maps for a few days and loaded the V402 beta maps today. I am running Stage 2+ Aggressive, stock throttle.

I did a couple of WOT 3rd gear runs for the DME to adapt before logging. Keep in mind that it is hot and humid as hell here in Florida right now. I did a couple of 2nd & 3rd gear runs and a couple of WOT 3rd gear runs. I felt a hiccup during one of the 3rd gear runs. Could be a misfire as I have gotten a few misfire codes on cylinder 4 recently.

Let me know what you guys think of the new maps in my logs:

BlueBimmer · 07-11-2012, 01:28 PM

Quote:

Originally Posted by
[B

Stage 1+ and Stage 2+ only.[/B]

This is what sucks - lol.

COBB Tuning · 07-11-2012, 01:47 PM

Quote:

Originally Posted by BlueBimmer

This is what sucks - lol.

BlueBimmer,

Why does that suck? Are you experiencing boost oscillations on a non-Stage+ map?

Thanks,

Gary

BlueBimmer · 07-11-2012, 02:03 PM

Quote:

Originally Posted by COBB Tuning

BlueBimmer,

Why does that suck? Are you experiencing boost oscillations on a non-Stage+ map?

Thanks,

Gary

Not that I know of - just eager to get the waaaayyy smoother map that's being experienced by others.

JStang · 07-11-2012, 02:06 PM

Quote:

Originally Posted by BlueBimmer

Not that I know of - just eager to get the waaaayyy smoother map that's being experienced by others.

Get yourself some DP's, an intercooler, and intake and you can experience it.

Zasquatch · 07-11-2012, 02:06 PM

Quote:

Originally Posted by BlueBimmer

Not that I know of - just eager to get the waaaayyy smoother map that's being experienced by others.

If you don't have boost oscillations, then you wouldn't be able to tell the difference between 4.01 and 4.02....

enrita · 07-11-2012, 02:15 PM

Quote:

Originally Posted by Zasquatch

If you don't have boost oscillations, then you wouldn't be able to tell the difference between 4.01 and 4.02....

Exactly the smoother is because boost oscillations are gone...

Lulz_M3 · 07-11-2012, 02:17 PM

Quote:

Originally Posted by JStang

Let me know what you guys think of the new maps in my logs:

You had some timing pulled on cylinder 1 on that last log but it recovered nicely. Looks good. Get that Cyl 4 misfire fixed before this Saturday

JStang · 07-11-2012, 02:20 PM

Quote:

Originally Posted by Lulz_M3

You had some timing pulled on cylinder 1 on that last log but it recovered nicely. Looks good. Get that Cyl 4 misfire fixed before this Saturday

Thanks! I went to the dealership and got a coil today after the runs. I'm having PRS make me an E85 map on Saturday and will post updated E85 logs and dyno's from map 0, Stage 2+ V402 OTS map and the E85 map for comparison.

I will be sure to check in on Sunday.

Jason@Cobb · 07-11-2012, 02:20 PM

Quote:

Originally Posted by JStang

Get yourself some DP's, an intercooler, and intake and you can experience it.

^^

You won't ever look back!

BlueBimmer · 07-11-2012, 02:52 PM

Quote:

Originally Posted by Jason@Cobb

^^

You won't ever look back!

Working on an intake - need to keep car as close to stock as possible so I can still take it in for warranty visits.

enrita · 07-11-2012, 02:55 PM

Quote:

Originally Posted by BlueBimmer

Working on an intake - need to keep car as close to stock as possible so I can still take it in for warranty visits.

Intake gives nothing at those powerlevels. A dealer wont spot an ic just by doing an oil change.

max_k20 · 07-11-2012, 03:19 PM

Are stg1 sport and agressive coming out as 4.02 too ? I'm pretty sure I do have oscillations on stg1 agressive and a little less on sport

07-11-2012, 10:03 AM	#5699
max_k20 Bavarian Love 24 Rep 263 Posts Drives: 230i xDrive Join Date: Mar 2012 Location: Quebec, Canada iTrader: (2)	Ok guyz a little issue just popped up. Log of stg 1 agressive are still looking Fine but from time to time, in any speed above 3rd gear (3rd, 4th, 5th or 6th even) when going part throttle or flooring it from cruising the engine is bogging down and feel like its shaking. Look like misfires to me but no check engine and cant reproduce at will (as normally when trying to reproduce after it happens it goes fine). Could it be heavy boost oscillations causing something like this ? Once again no limp mode, no check engine or stored code and no half engine light. It's starting to get me worried. Also as I cant reproduce at will cant really log whats happening. Edit : forgot to add it seems to happen at 2500-3000 rpm most time it happens (3 time since flashing to agressive) __________________ 08 FG2 Civic SI FBO - SOLD 09 E92 335i Xdrive FBO - SOLD 17 F22 230i Xdrive \| Alpine White \| Coral Red \| M-Sport \| BMS Intake \| JB4 \| 666M Rep \| M Carbon Mirrors \| Roof Rack \| Daily Driven
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07-11-2012, 10:47 AM	#5703
Beas Private First Class 20 Rep 179 Posts Drives: Skyline Join Date: Dec 2011 Location: Las Vegas iTrader: (-1)	so, running cobb stage 2, how strong should my BOV be? was going to order a tial valve and noticed they have 2,4,6,10,12 psi valves. what would be good?
	Appreciate 0 Quote

07-11-2012, 11:02 AM	#5705
Beas Private First Class 20 Rep 179 Posts Drives: Skyline Join Date: Dec 2011 Location: Las Vegas iTrader: (-1)	ok, cause i think the hks valve is leaking, car wont boost over 4-5 lbs. im wondering if maybe the BOV i have is setup for stock boost, and running the cobb stage 2 is causing it to leak. getting a loud police siren type noise from the intake side, sounds like a supercharger.
	Appreciate 0 Quote

07-11-2012, 01:21 PM	#5708
JStang Brigadier General 562 Rep 3,625 Posts Drives: FDB M3 CS Join Date: Dec 2010 Location: St. Petersburg, FL iTrader: (9)	Bear with me here as this is my first time logging. Other than the basics, I don't know what in the hell I'm doing. I had be running the V402 alpha maps for a few days and loaded the V402 beta maps today. I am running Stage 2+ Aggressive, stock throttle. I did a couple of WOT 3rd gear runs for the DME to adapt before logging. Keep in mind that it is hot and humid as hell here in Florida right now. I did a couple of 2nd & 3rd gear runs and a couple of WOT 3rd gear runs. I felt a hiccup during one of the 3rd gear runs. Could be a misfire as I have gotten a few misfire codes on cylinder 4 recently. Let me know what you guys think of the new maps in my logs: Last edited by JStang; 07-11-2012 at 01:51 PM..
	Appreciate 0 Quote

07-11-2012, 03:19 PM	#5720
max_k20 Bavarian Love 24 Rep 263 Posts Drives: 230i xDrive Join Date: Mar 2012 Location: Quebec, Canada iTrader: (2)	Are stg1 sport and agressive coming out as 4.02 too ? I'm pretty sure I do have oscillations on stg1 agressive and a little less on sport __________________ 08 FG2 Civic SI FBO - SOLD 09 E92 335i Xdrive FBO - SOLD 17 F22 230i Xdrive \| Alpine White \| Coral Red \| M-Sport \| BMS Intake \| JB4 \| 666M Rep \| M Carbon Mirrors \| Roof Rack \| Daily Driven
	Appreciate 0 Quote