Should I Reset Adaptation Values? (Misfire On Startup After New Plugs and Coils)

shaginwagon13 · 01-19-2013, 09:01 PM

Hey guys,

I was getting misfires prior to the winter so I changed plugs, coils and all fluids.

After I changed the plugs and coils, I started getting misfire codes only at the first start-up of the day (in the mornings before I would drive to work). I never would get a misfire again for the rest of the day and they only seem to occur on cold mornings, never on warm ones. I would start the car, let it idle and I would get a misfire.

I was reading somewhere that sometimes you need to reset the adaptation values and was wondering if anyone has done this? Or has anyone experienced similar issues when changing plugs and coils?

I bought the BT scan tool and I have COBB so I can reset the values, I just don't know if I should.

boostaholic786 · 01-19-2013, 10:21 PM

I have the JB4 G5 ISO and I have been wondering the same exact thing....

shaginwagon13 · 01-19-2013, 11:36 PM

Quote:

Originally Posted by boostaholic786

I have the JB4 G5 ISO and I have been wondering the same exact thing....

I know we need some help here...

nitehawk · 01-20-2013, 12:52 AM

I reset mine with the Cobb AP when I changed plugs and never had any issues. No harm in clearing adaptations, it will just help you narrow down the root cause of the issue.

shaginwagon13 · 01-20-2013, 10:00 AM

Quote:

Originally Posted by nitehawk

I reset mine with the Cobb AP when I changed plugs and never had any issues. No harm in clearing adaptations, it will just help you narrow down the root cause of the issue.

I have been doing some reading about clearing the adaptations.... do I clear them all or just some?

I have COBB as well.

nitehawk · 01-20-2013, 12:26 PM

The Cobb will reset all adaptations, it doesn't allow you to pick them specifically.
If you use the BT Tool, you can clear just some of them. I remember Mr 5 made a thread about it a while ago...

EDIT: found it
http://www.e90post.com/forums/showthread.php?t=386376

shaginwagon13 · 01-20-2013, 01:04 PM

Quote:

Originally Posted by nitehawk

The Cobb will reset all adaptations, it doesn't allow you to pick them specifically.
If you use the BT Tool, you can clear just some of them. I remember Mr 5 made a thread about it a while ago...

EDIT: found it
http://www.e90post.com/forums/showthread.php?t=386376

Thanks buddy.

trufus · 01-20-2013, 06:23 PM

Dealing with this same issue myself. I tried resetting adaptations by unplugging the battery for a few hours before I took the car in, there was no effect on the misfires. When I took the car to the dealer a few weeks ago, they replaced the Bank 2 injectors under warranty. The engine is a lot smoother now at startup and idle, but the engine is still stumbling occasionally at cold AND warm idle.

I've seen a few threads around where many people have experienced this same issue. I'm taking it back in to the dealer tomorrow morning, we'll see what the SA says.

shaginwagon13 · 01-20-2013, 09:41 PM

Quote:

Originally Posted by trufus

Dealing with this same issue myself. I tried resetting adaptations by unplugging the battery for a few hours before I took the car in, there was no effect on the misfires. When I took the car to the dealer a few weeks ago, they replaced the Bank 2 injectors under warranty. The engine is a lot smoother now at startup and idle, but the engine is still stumbling occasionally at cold AND warm idle.

I've seen a few threads around where many people have experienced this same issue. I'm taking it back in to the dealer tomorrow morning, we'll see what the SA says.

Maybe you need carbon cleaning on your intake valves?

trufus · 01-21-2013, 12:01 AM

Quote:

Originally Posted by shaginwagon13

Maybe you need carbon cleaning on your intake valves?

Definite possibility, I'm over 45k miles so it's about that time. The cleaning has helped some cars with this issue and some cars still have stumbling after the cleaning. Unfortunately there's no way to tell until it gets done.

SkySoldier · 01-21-2013, 01:08 AM

I'm having the same issue as of late. Just changed the the spark plugs and cleaned the intake valves. I reset the adaptations with procede tonight, I'll let you know if it helps at all.

shaginwagon13 · 01-21-2013, 05:15 AM

Quote:

Originally Posted by SkySoldier

I'm having the same issue as of late. Just changed the the spark plugs and cleaned the intake valves. I reset the adaptations with procede tonight, I'll let you know if it helps at all.

Ya keep us informed if resetting the adaptation values helped...

shaginwagon13 · 01-22-2013, 01:20 AM

Bump

SkySoldier · 01-22-2013, 01:47 AM

Quote:

Originally Posted by shaginwagon13

Ya keep us informed if resetting the adaptation values helped...

3 cold starts done so far after the resets, idling perfect now, I'll update if the rough idle comes back.

Beemzilla · 06-08-2015, 01:24 AM

Quote:

Originally Posted by nitehawk

The Cobb will reset all adaptations, it doesn't allow you to pick them specifically.
If you use the BT Tool, you can clear just some of them. I remember Mr 5 made a thread about it a while ago...

EDIT: found it
http://www.e90post.com/forums/showthread.php?t=386376

Years later, thread from the dead!

How does a guy use the Cobb to reset adaptations? Yes, aside from "Clear Codes", what do you select??

01-19-2013, 09:01 PM	#1
shaginwagon13 Chartered Accountant 64 Rep 970 Posts Drives: BMW 335i Coupe Join Date: Apr 2012 Location: Toronto iTrader: (4)	Should I Reset Adaptation Values? (Misfire On Startup After New Plugs and Coils) Hey guys, I was getting misfires prior to the winter so I changed plugs, coils and all fluids. After I changed the plugs and coils, I started getting misfire codes only at the first start-up of the day (in the mornings before I would drive to work). I never would get a misfire again for the rest of the day and they only seem to occur on cold mornings, never on warm ones. I would start the car, let it idle and I would get a misfire. I was reading somewhere that sometimes you need to reset the adaptation values and was wondering if anyone has done this? Or has anyone experienced similar issues when changing plugs and coils? I bought the BT scan tool and I have COBB so I can reset the values, I just don't know if I should. Last edited by shaginwagon13; 01-19-2013 at 09:33 PM..
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01-19-2013, 10:21 PM	#2
boostaholic786 Captain 40 Rep 623 Posts Drives: E92 N54 with MHD Custom flash Join Date: Dec 2011 Location: Plano TX iTrader: (0)	I have the JB4 G5 ISO and I have been wondering the same exact thing.... __________________ [SIZE="2"]Crimson Red E92 335i M-sport 6-speed with MHD custom stage 2+ flash only , 40% E85/93 mix,+ HRE P40S wheels, KW Clubsport, M3 sways,+BMW performance CF Mirrors, BMW Performance CF deck lid spoiler,+ CF interior trim, p3 vent boost gauge,+ LUX angel eyes (11.73@124mph on street tires)
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01-20-2013, 12:52 AM	#4
nitehawk Lieutenant Colonel 102 Rep 1,903 Posts Drives: e92 335i 6MT Join Date: May 2011 Location: Toronto iTrader: (15) Garage List E92 BMW 335i [9.00] E92 BMW 335i \| Retired [10.00]	I reset mine with the Cobb AP when I changed plugs and never had any issues. No harm in clearing adaptations, it will just help you narrow down the root cause of the issue.
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01-20-2013, 12:26 PM	#6
nitehawk Lieutenant Colonel 102 Rep 1,903 Posts Drives: e92 335i 6MT Join Date: May 2011 Location: Toronto iTrader: (15) Garage List E92 BMW 335i [9.00] E92 BMW 335i \| Retired [10.00]	The Cobb will reset all adaptations, it doesn't allow you to pick them specifically. If you use the BT Tool, you can clear just some of them. I remember Mr 5 made a thread about it a while ago... EDIT: found it http://www.e90post.com/forums/showthread.php?t=386376
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01-20-2013, 06:23 PM	#8
trufus Private 0 Rep 67 Posts Drives: 2009 E92 335i Join Date: Apr 2012 Location: TX iTrader: (0)	Dealing with this same issue myself. I tried resetting adaptations by unplugging the battery for a few hours before I took the car in, there was no effect on the misfires. When I took the car to the dealer a few weeks ago, they replaced the Bank 2 injectors under warranty. The engine is a lot smoother now at startup and idle, but the engine is still stumbling occasionally at cold AND warm idle. I've seen a few threads around where many people have experienced this same issue. I'm taking it back in to the dealer tomorrow morning, we'll see what the SA says.
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01-21-2013, 01:08 AM	#11
SkySoldier Private 7 Rep 94 Posts Drives: Jet Black E90 335I Join Date: Mar 2008 Location: USA iTrader: (1)	I'm having the same issue as of late. Just changed the the spark plugs and cleaned the intake valves. I reset the adaptations with procede tonight, I'll let you know if it helps at all. __________________ 2008 Jet Black 335I E90 Mods: Procede, HPF intercooler, Helene filter, intake scoops, Riss Racing can, 18" VM V710 wheels, PIAA angel eyes, black grill, blacklines, 20% tint, OE CF splitters and spoiler. 1999 Pearl White 3000GT VR4 (far from stock)
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01-22-2013, 01:20 AM	#13
shaginwagon13 Chartered Accountant 64 Rep 970 Posts Drives: BMW 335i Coupe Join Date: Apr 2012 Location: Toronto iTrader: (4)	Bump
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