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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 10-03-2012, 06:24 PM
CPBIII CPBIII is offline
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Problems after CVV/Oil Separator replacement

So that you won't have to ream me later, let me start by saying that I began this project with some bad advice from the service writer at the local BMW dealership. Mainly, that the intake has to come off to replace this valve. It DOESN'T. I know that now.

So while I was in the midst of taking the intake off, I also disconnected and completely removed the fuel injection rail.

I put everything back together, and have a dead miss on cylinder 4 from error codes (not to mention it will barely idle).

Getting codes
P1342 Misfire during start Cylinder 1
P1349 Misfire Cylinder 4 with Fuel Cutoff
P0204 Injector Circuit Open Cylinder 4

Does this look like something as simple as the injector connector not being secure? Those connectors are on a single long fixture. I would think they all have to be at least in place, but maybe I didn't get it all way engaged???

So now it will barely idle without shaking your fillings loose. The engine will rev up, but it really doesn't want to.

Any ideas??? Any help is GREATLY appreciated.

Chris
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  #2  
Old 10-03-2012, 07:51 PM
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jvr826 jvr826 is offline
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Retrace your steps and make sure you put everything back in the right place and everything that needs to be plugged in, is plugged in. It might be a good idea to disconnect and reconnect everything again, just to be sure it's all together right.
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  #3  
Old 10-03-2012, 08:17 PM
CPBIII CPBIII is offline
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Quote:
Originally Posted by jvr826 View Post
Retrace your steps and make sure you put everything back in the right place and everything that needs to be plugged in, is plugged in. It might be a good idea to disconnect and reconnect everything again, just to be sure it's all together right.
That's the plan right now.

I did take extra care to not hit or bump the ejectors while they were out. Would three days of exposure to dry air have any effect on them I wonder??
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  #4  
Old 10-04-2012, 09:26 AM
GoForthFast GoForthFast is offline
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Injectors would not be hurt by getting dry. They sit that way in stock for years and are OK.

Rough idle could be lack of a cylinder or two not firing. Yes, it could be a connector did not mate up with injector properly. I'd suspect that first.

In the future and for anyone else, don't take off the fuel rail is you don't have to. Just set it aside and work around it.
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  #5  
Old 10-04-2012, 09:34 AM
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Fast Bob Fast Bob is offline
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You can also start the "Process Of Elimination" by swapping the number 3 and 4 coils, and see if the fault follows the coil. If that doesn`t reveal anything, try the same thing with the injectors.

Good luck !
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  #6  
Old 10-04-2012, 10:25 AM
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j_schroeder j_schroeder is offline
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I haven't had a bmw fuel injector off but if there are o rings replace them. A bad sealed injector can cause similar issues if its bad enough.

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  #7  
Old 10-04-2012, 08:46 PM
chansta chansta is offline
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Quote:
Originally Posted by CPBIII View Post
So that you won't have to ream me later, let me start by saying that I began this project with some bad advice from the service writer at the local BMW dealership. Mainly, that the intake has to come off to replace this valve. It DOESN'T. I know that now.

So while I was in the midst of taking the intake off, I also disconnected and completely removed the fuel injection rail.

I put everything back together, and have a dead miss on cylinder 4 from error codes (not to mention it will barely idle).

Getting codes
P1342 Misfire during start Cylinder 1
P1349 Misfire Cylinder 4 with Fuel Cutoff
P0204 Injector Circuit Open Cylinder 4


Does this look like something as simple as the injector connector not being secure? Those connectors are on a single long fixture. I would think they all have to be at least in place, but maybe I didn't get it all way engaged???

So now it will barely idle without shaking your fillings loose. The engine will rev up, but it really doesn't want to.

Any ideas??? Any help is GREATLY appreciated.

Chris
lets start with that.
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  #8  
Old 10-04-2012, 10:48 PM
GoForthFast GoForthFast is offline
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Quote:
Originally Posted by Fast Bob View Post
You can also start the "Process Of Elimination" by swapping the number 3 and 4 coils, and see if the fault follows the coil. If that doesn`t reveal anything, try the same thing with the injectors.
Before I'd toy around with swapping injectors (no walk in the park), I'd listen to each one with a stethoscope for the clicking sound they make when working.
Worn O-ring could be responsible if they were not replaced when the fuel rail was reinstalled. Should not be reused.
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  #9  
Old 10-05-2012, 07:11 AM
CPBIII CPBIII is offline
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Location: East Earl, PA
 
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Mein Auto: 2002 325i
I R&Red the long connector that has all the fuel injector terminals. That seems to have cured the misfire issue on cylinder 4. Still having problems though with lean codes:

http://www.bimmerfest.com/forums/sho...019&highlight=
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