Terrible Dyno -V2+K&N+DP+Catback

OpenFlash · 01-18-2008, 03:07 PM

Quote:

Originally Posted by ThomasMartin

Good catch shiv i hope its just that ill have to check it on the lift tomorrow morning.
how are they supposed to be placed?

Just take it back to the installer and let him deal with it. And it is just that. The P0040 code gave it away. You just installed downpipes and the code is for o2 sensors swapped. Pretty conclusive, no?

shiv

ThomasMartin · 01-18-2008, 03:17 PM

Quote:

Originally Posted by shiv@vishnu

Just take it back to the installer and let him deal with it. And it is just that. The P0040 code gave it away. You just installed downpipes and the code is for o2 sensors swapped. Pretty conclusive, no?

shiv

And that would cause all the misfiring?

Jonmartin · 01-18-2008, 03:25 PM

Quote:

Originally Posted by ThomasMartin

And that would cause all the misfiring?

Yup I've personally seen this happen on somene elses car they screwed up their install and had to tow their car to Logic to get it fixed once the plugs were placed correctly everything ran perfectly.

ThomasMartin · 01-18-2008, 03:28 PM

Quote:

Originally Posted by Jonmartin

Yup I've personally seen this happen on somene elses car they screwed up their install and had to tow their car to Logic to get it fixed once the plugs were placed correctly everything ran perfectly.

Its not dangerous to drive or anything i can drive slowly to the installer?

stressdoc · 01-18-2008, 03:35 PM

Nice job of troubleshooting. Kudos to the Shivmeister!

ThomasMartin · 01-18-2008, 03:37 PM

Quote:

Originally Posted by stressdoc

Nice job of troubleshooting. Kudos to the Shivmeister!

+1000 Good troubleshoot! Thanks Shiv!

OpenFlash · 01-18-2008, 03:37 PM

Quote:

Originally Posted by ThomasMartin

And that would cause all the misfiring?

Yes. This is because the ecu is trying to control fuel to one bank of cylinders based upon the o2 sensor data from the other bank. So what you get is uncontrolled rich/lean conditions which result in actual misfire. It is safe to drive the car to the installer. Just cruise it over (no boost).

Shiv

ThomasMartin · 01-18-2008, 03:47 PM

Quote:

Originally Posted by shiv@vishnu

Yes. This is because the ecu is trying to control fuel to one bank of cylinders based upon the o2 sensor data from the other bank. So what you get is uncontrolled rich/lean conditions which result in actual misfire. It is safe to drive the car to the installer. Just cruise it over (no boost).

Shiv

Quick question, are the o2 sensor wires in the ecu swappable? just thinking if the installer is closed tomorrow can i swop the ecu o2 sensor wires until Monday wont this have the same effect?

IGNORE THAT ILL JUST FIND AN EXHAUST SHOP TOMORROW THAT IS OPEN TO HELP ME OUT

Thanks again for the help everyone!!!

OpenFlash · 01-18-2008, 03:53 PM

Quote:

Originally Posted by ThomasMartin

Quick question, are the o2 sensor wires in the ecu swappable? just thinking if the installer is closed tomorrow can i swop the ecu o2 sensor wires until Monday wont this have the same effect?

Please don't do that. You don't necessarily need the same installer to unswap the sensors. Any shop can do that. Should only take 10 minutes or so.

Shiv

cn555ic · 01-18-2008, 04:35 PM

He probably has to go through jungles and forest to get to his mechanic!! lolo

Joking....I hear you man....when you want something fixed I kind of want to do it right away...Maybe you can jack it up and do it yourself...I am pretty sure a open end wrench can take those o2 sensors off!!

scalbert · 01-18-2008, 07:50 PM

Quote:

Originally Posted by cn555ic

Joking....I hear you man....when you want something fixed I kind of want to do it right away...Maybe you can jack it up and do it yourself...I am pretty sure a open end wrench can take those o2 sensors off!!

A crow's foot and an air wratchet work well for those front sensors.

e90AW335i · 01-18-2008, 07:55 PM

Quote:

Originally Posted by stressdoc

Nice job of troubleshooting. Kudos to the Shivmeister!

+1, nice work Shiv....

DreM3 · 01-18-2008, 10:30 PM

Quote:

Originally Posted by kyleh4852

+1, nice work Shiv....

+1000!

garyhgaryh · 01-19-2008, 12:39 AM

That over the internet diagnostic was worth some $$$$ there.
Perhaps Shiv should consider this as a second line of work.... j/k...
Gary

335vince · 01-19-2008, 03:28 AM

TheBreak · 01-19-2008, 04:37 AM

and the problem wasn't even with the tune.
I'm sure Shiv has more important things to be doing then trying to fix your own installers mess ups while you try and blame his tune

hotrod182 · 01-19-2008, 05:59 AM

Quote:

Originally Posted by ThomasMartin

Good catch shiv i hope its just that ill have to check it on the lift tomorrow morning.
how are they supposed to be placed?

Perhaps all the O2 sensor harnesses use the same color coding?

ThomasMartin · 01-19-2008, 07:57 AM

Quote:

Originally Posted by hotrod182

Perhaps all the O2 sensor harnesses use the same color coding?

Thanks

can you by any chance show me the top of the engine with the cover off, the sensor wire big clips? Cause i took it back to the installer and he just opened the engine bay took the covers off and changed around two big clips no more misfiring but im still getting other codes different ones now?

WilyB · 01-19-2008, 08:40 AM

Thomas: did you follow Shiv's advice?

Quote:

Probably a good idea would be to plug in your bypass plugs and drive around for a day and see if the car behaves strangely.

ThomasMartin · 01-19-2008, 08:49 AM

Quote:

Originally Posted by WilyB

Thomas: did you follow Shiv's advice?

Shiv told me to disrigard that and just check the DP and exhaust install.
I cleared all the codes
They opened the engine cover and swoped 2 clips
All misfiring was gone
i was throwing
P0040 Upstream Oxygen Sensors Swapped From Bank To Bank

Now im throwing
P0041 Downstream Oxygen Sensors Swapped From Bank To Bank

But at least it sounds and feels much more powerful im loving no misfiring.

e.n335 · 01-19-2008, 09:15 AM

I think this was not what Shiv recommended to do. You should have swapped the O2 sensors in the downpipes. However, I don't know whether swapping 2 plugs causes the same ...

ThomasMartin · 01-19-2008, 09:21 AM

Quote:

Originally Posted by e.n335

I think this was not what Shiv recommended to do. You should have swapped the O2 sensors in the downpipes.

I know it isnt what he said but the installer swapped the two big plugs in the engine bay, i dont see why it would make a difference though. He just didnt have a lift for me to use so either that or i cant drive the car cause its misfiring so much. At least there is no misfiring now

I need to swop the two bottom clips now does anyone know where they are? are they at the bottom of the car or also in the engine bay?

He swopped the top sensors clips from bank(left) to bank(right) cause i was getting P0040 Upstream Oxygen Sensors.
now im getting P0041 Downstream Oxygen Sensors Swapped From Bank To Bank so i just think the bottom two big clips need swapping now? The top clips where nice and easy under the engine cover, does anyone know where the bottom sensor clips are?

01-18-2008, 03:35 PM	#27
stressdoc Moderator 660 Rep 10,865 Posts Drives: BMW i8; Toy 4runner TRD pro Join Date: Jun 2005 Location: Waco TX iTrader: (0)	Nice job of troubleshooting. Kudos to the Shivmeister! __________________ My recent ED photos: http://f80.bimmerpost.com/forums/sho....php?t=1026808 my not-so-recent ED: http://www.e90post.com/forums/showthread.php?t=31829 Please join BMWCCA http://bmwcca.org/index.php?pageid=c...&ref_by=300279
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01-18-2008, 04:35 PM	#32
cn555ic 464 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	He probably has to go through jungles and forest to get to his mechanic!! lolo Joking....I hear you man....when you want something fixed I kind of want to do it right away...Maybe you can jack it up and do it yourself...I am pretty sure a open end wrench can take those o2 sensors off!!
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01-19-2008, 12:39 AM	#36
garyhgaryh Major 79 Rep 1,232 Posts Drives: Supercharged e30 M3 Join Date: Jan 2007 Location: santa cruz iTrader: (4)	That over the internet diagnostic was worth some $$$$ there. Perhaps Shiv should consider this as a second line of work.... j/k... Gary
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01-19-2008, 03:28 AM	#37
335vince Private 6 Rep 74 Posts Drives: You Crazy Join Date: Jul 2007 Location: Oakland CA iTrader: (2)
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01-19-2008, 04:37 AM	#38
TheBreak Private First Class 1 Rep 136 Posts Drives: 2008 E92 335i Join Date: Jan 2008 Location: Los Angeles iTrader: (0)	and the problem wasn't even with the tune. I'm sure Shiv has more important things to be doing then trying to fix your own installers mess ups while you try and blame his tune
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01-19-2008, 09:15 AM	#43
e.n335 Moderator 282 Rep 4,481 Posts Drives: e93 ///M3 DCT, 07/2009 Join Date: Feb 2007 Location: Switzerland, ZH iTrader: (0)	I think this was not what Shiv recommended to do. You should have swapped the O2 sensors in the downpipes. However, I don't know whether swapping 2 plugs causes the same ...
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