My atco 1/4 mile results... misfire issue

dzenno · 02-28-2011, 10:59 AM

IC ramps up towards zero as you reach redline

Clap135 · 02-28-2011, 11:32 AM

Guys trust me on this, these misfire are tune related. You know the latest fix for these DIC maps is to turn off the DIC (think of your grandma) above 6500 right?

AltecBX · 02-28-2011, 12:52 PM

What was the fix to the misfire after the cold temp testing?

Lets just wait until Shiv tells us what's wrong with these maps.

BrianMN · 02-28-2011, 01:59 PM

Quote:

Originally Posted by FastGator

misfire problem? i thought no problems with v5? this new or old information?

Quote:

Originally Posted by FastGator

so, CPS is good, but V5 CPS strategist is not good?

Guys, There was a small handful of 6AT users (maybe 10-20 who mentioned it) who had misfires above 6500rpm when the tranny shifted by itself. Keep in mind how many hundreds or thousands of users who went on without misfires.

The misfires had something to do with the CPS signal and it's tolerances. These issues were fixed in the latest non-DIC update. Now when DIC was introduced, the people appear to be getting misfires again, but the fix is being worked on.

Moral of the story, don't let a small percentage of users with a bug make you assume you will be getting misfires too.

GeorgiaTech335coupe · 02-28-2011, 03:28 PM

Quote:

Originally Posted by FastGator

so its is prevelent than? not just in auto but manuel too? too many problems with v5 lately

You should reread my quote. I am essentially saying that it is NOT prevalent in MTs. I have never had a misfire for this cause and I can't remember reading about any MTs having it either.

Quote:

Originally Posted by FastGator

you guys need to make up mind. v5 does something its no sweat, anyone else does something, its godzilla havoc in your motor.. make up your mind please

What are you talking about?

ZTUNER · 02-28-2011, 03:57 PM

Quote:

Originally Posted by Joshboody

I don't think this would be an issue, because when you are delaying injector timing by CPS, you are also retarding timing the same amount. Again, I don't think this is an actual mechanical cylinder issue, but how it's implemented.

I'm curious when this actually happens... in gear at the upper rpms, or mid-shift, etc. In the winter time at high rpms, I would bet most are seeing close to 0deg in IC if using DIC especially, but even on the old maps i think IC was considerably lowered in the upper rpm.

logs would be great.

This would be true if retarding the crank timing is in a 1:1 ratio with ignition and injection. Problem is that its not.

Harry

Jeff@TopGearSolutions · 02-28-2011, 04:01 PM

Go back to a FW and Map that had no misfires.
The new maps still have some bugs. Misfires were fixed until Shiv started playing with his DIC.

Note: For the record I never had misfires, but I have MT.

usc335 · 02-28-2011, 04:11 PM

I have a MT and have never had a misfire. The misfire is a AT issue only as mentioned above.

Joshboody · 02-28-2011, 04:12 PM

Quote:

Originally Posted by ZTUNER

This would be true if retarding the crank timing is in a 1:1 ratio with ignition and injection. Problem is that its not.

Harry

How do you figure? You change the crank position signal to read x degrees which correlates to y deg of timing retard/adv. And I believe x = y. whatever the relationship, timing and injection are determined from the same crank signal.

please explain otherwise.

FYI: I too have had NO issues... but i'm MT also.

GeorgiaTech335coupe · 02-28-2011, 04:22 PM

Quote:

Originally Posted by Joshboody

How do you figure? You change the crank position signal to read x degrees which correlates to y deg of timing retard/adv. And I believe x = y. whatever the relationship, timing and injection are determined from the same crank signal.

please explain otherwise.

FYI: I too have had NO issues... but i'm MT also.

Edited my post. The more I think about it, the more I may be in agreement with you. Gonna ponder it a little longer...

ZTUNER · 02-28-2011, 05:50 PM

Quote:

Originally Posted by Joshboody

How do you figure? You change the crank position signal to read x degrees which correlates to y deg of timing retard/adv. And I believe x = y. whatever the relationship, timing and injection are determined from the same crank signal.

please explain otherwise.

FYI: I too have had NO issues... but i'm MT also.

I don't have proof for this engine since i don't have the maps in front of me but in other applications injection timing is not a linear scale to crank angle timing. Thats due to the injection duration issue. There usually is a scaling map that adjusts injection timing relative to injection duration. In other words there is a map that ADVANCES injection timing as duration goes up. What matters in injection is not so much the onset of injection but the conclusion of the injection event. The injector must close in advance of the spark being initiated.

Not sure how to explain this in a post but say you need only 2ms of injection duration, you could delay (retard) the injection quite a bit however once your rpm goes up AND load goes up the window of opportunity to spray the fuel for the larger duration, have it atomize AND not foul the plug gets very small. At this juncture delaying the onset of injection due to CAS retard has an exponential effect on when the injection process completes.

Harry

themyst · 02-28-2011, 11:18 PM

Quote:

Originally Posted by BrianMN

Guys, There was a small handful of 6AT users (maybe 10-20 who mentioned it) who had misfires above 6500rpm when the tranny shifted by itself. Keep in mind how many hundreds or thousands of users who went on without misfires.

The misfires had something to do with the CPS signal and it's tolerances. These issues were fixed in the latest non-DIC update. Now when DIC was introduced, the people appear to be getting misfires again, but the fix is being worked on.

Moral of the story, don't let a small percentage of users with a bug make you assume you will be getting misfires too.

It's not a small percentage. The good news is I'm running a misfire-free 6AT DIC map right now. If Shiv can add the boost back to whatever this map targets at redline, he can take his autotuning and whatever else doohickey features and keep 'em. Misfires are annoying as sin.

cuban335 - I take special interest in your frustrations because I wasted a 2 hour drive from NYC to drive down to Atco last year, only to misfire my face off on the way there. They shouldn't happen, period.

bimmer72 · 05-23-2011, 09:59 AM

Are you guys having misfires still with 3-30 maps? I have full bolt on and was running race gas at the track and kept misfire towards redline on 4th to 5th shift. Threw in a friends jb3 and it didnt misfire at the top of 4th. Any special map I can use cause its annoying as hell.

enrita · 05-23-2011, 10:04 AM

try the 5-10.

dzenno · 05-23-2011, 10:24 AM

Has anyone misfired on 5-10 DIC yet?

OpenFlash · 05-23-2011, 10:43 AM

Quote:

Originally Posted by bimmer72

Are you guys having misfires still with 3-30 maps? I have full bolt on and was running race gas at the track and kept misfire towards redline on 4th to 5th shift. Threw in a friends jb3 and it didnt misfire at the top of 4th. Any special map I can use cause its annoying as hell.

You should not be misfiring with either the 3-30 or more recent maps. If you are misfiring, it's for another reason. I can only guess too much boost for your hardware. Could be bad plugs, coil or injector. It will help to know the exact code.

And top of 4th gear? That's 140mph... You're running that fast at the track?

jpsimon · 05-23-2011, 10:45 AM

Quote:

Originally Posted by dzenno

Has anyone misfired on 5-10 DIC yet?

I have never misfired, and still haven't with 5-10

themyst · 05-23-2011, 12:03 PM

Quote:

Originally Posted by shiv@vishnu

You should not be misfiring with either the 3-30 or more recent maps. If you are misfiring, it's for another reason. I can only guess too much boost for your hardware. Could be bad plugs, coil or injector. It will help to know the exact code.

And top of 4th gear? That's 140mph... You're running that fast at the track?

I believe the automatics redline at 133mph, the manuals redline around 140.

enrita · 05-23-2011, 12:06 PM

Quote:

Originally Posted by themyst

I believe the automatics redline at 133mph, the manuals redline around 140.

other way around, AT go slightly faster than MT in 4th. Longer gearing

themyst · 05-23-2011, 12:09 PM

Quote:

Originally Posted by enrita

other way around, AT go slightly faster than MT in 4th. Longer gearing

Thought the manuals have taller gearing? Pretty sure that's the case actually except for 6th.

GeorgiaTech335coupe · 05-23-2011, 01:06 PM

MT goes to 142, 3.08 rear, 1.19 4th gear
AT goes to 132, 3.46 rear, 1.14 4th gear

bimmer72 · 05-23-2011, 02:04 PM

Quote:

Originally Posted by shiv@vishnu

You should not be misfiring with either the 3-30 or more recent maps. If you are misfiring, it's for another reason. I can only guess too much boost for your hardware. Could be bad plugs, coil or injector. It will help to know the exact code.

And top of 4th gear? That's 140mph... You're running that fast at the track?

Nah not running that fast at the track but didnt know when to stop so I went to 4th -> 5th shift. I will try and update to 5-10 maps but was runnging 13.5 boost and hardware is good (injectors plug coil replaced by dealer) also I didnt misfire with a friend jb3 so thats weird.

02-28-2011, 10:59 AM	#45
dzenno Banned 280 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	IC ramps up towards zero as you reach redline
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02-28-2011, 11:32 AM	#46
Clap135 Brigadier General 105 Rep 3,460 Posts Drives: 2009 N54 Join Date: Jul 2009 Location: Sticky's Mom House iTrader: (1)	Guys trust me on this, these misfire are tune related. You know the latest fix for these DIC maps is to turn off the DIC (think of your grandma) above 6500 right?
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02-28-2011, 12:52 PM	#47
AltecBX Colonel 335 Rep 2,663 Posts Drives: BMW 335xi Sedan; BMW M3 ZCP Join Date: Nov 2007 Location: NYC iTrader: (0) Garage List 2018 BMW M3 ZCP [0.00] 2007 BMW 335Xi [0.00]	What was the fix to the misfire after the cold temp testing? Lets just wait until Shiv tells us what's wrong with these maps. __________________ 335xi Sedan 6AT \| Weather(70-85°F) \| N54 Tune Comparison Chart \|\| N54 Turbo Upgrade Comparison Chart -PROcede Rev. 2.5 ~ v5 (3/17 maps) / JB4 (8/21 maps) / COBB (Stg2+FMIC LT Aggressive maps) †Procede Map2(UT 45 - IGN 40) Aggression Target 2.0 \| 0-60 in 4.0sec \|\| †Cobb E30 LT (35% Ethanol/65% 93 Octane) \| 0-60 in 3.9sec AR Design Catless DP \| BMS DCI + OCC \| ETS 5 FMIC \| Alpina B3 Trans Flash \|235/265 19" Michelin PSS
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02-28-2011, 04:01 PM	#51
Jeff@TopGearSolutions 3461 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Go back to a FW and Map that had no misfires. The new maps still have some bugs. Misfires were fixed until Shiv started playing with his DIC. Note: For the record I never had misfires, but I have MT.
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02-28-2011, 04:11 PM	#52
usc335 First Lieutenant 66 Rep 383 Posts Drives: 21 M2C\|24 X3 M40i\|08 E92 335 Join Date: May 2008 Location: so cal iTrader: (1)	I have a MT and have never had a misfire. The misfire is a AT issue only as mentioned above.
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05-23-2011, 09:59 AM	#57
bimmer72 Second Lieutenant 25 Rep 276 Posts Drives: 335i Join Date: May 2010 Location: In My Car iTrader: (5)	Are you guys having misfires still with 3-30 maps? I have full bolt on and was running race gas at the track and kept misfire towards redline on 4th to 5th shift. Threw in a friends jb3 and it didnt misfire at the top of 4th. Any special map I can use cause its annoying as hell.
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05-23-2011, 10:04 AM	#58
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	try the 5-10. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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05-23-2011, 10:24 AM	#59
dzenno Banned 280 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	Has anyone misfired on 5-10 DIC yet?
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05-23-2011, 01:06 PM	#65
GeorgiaTech335coupe Lieutenant Colonel 81 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	MT goes to 142, 3.08 rear, 1.19 4th gear AT goes to 132, 3.46 rear, 1.14 4th gear __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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