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  #81  
Old 06-12-2020, 10:35 AM
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Quote:
Originally Posted by turquise1 View Post
Quick update :


Yesterday I pulled all the spark plugs out. Bank 1 side was definitely oil / carbon fouled. I replaced them with new ones and cleaned out the bank 2 side spark plugs as well.


The car actually starts now and tries to stay running. It's not as bad as before but still crappy. I am also still getting the same errors (1-4 cylinder misfire). I will switch a couple of coils to see what happens..


Thanks,


Ozzie
Hopefully you are switching coil with the other bank and not just adjacent cylinders.
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  #82  
Old 06-12-2020, 01:21 PM
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Quote:
Originally Posted by turquise1 View Post
I certainly agree with you. I must add the little mess I made during the oil change to the equation. But going back to transmission install, the full exhaust system comes out (and goes back in). It sat in a very messy (tools and metal pieces everywhere) humid garage for 2 weeks. Not sure if anything would have happened to it then. My first worry was the wire harness but there is spark on plugs so there is connection which mostly eliminates a wire harness problem.

What else would it be?

Cheers,

Ozzie
I have had instances where insulation appeared to be fine on the outside but the inside wire was not. I would test wires for continuity that could have been damaged during the project. I little voice in my head keeps saying the install is still not correct or there is damage from the initial install causing the problem. Hopefully that is not the case. Dropping the exhaust could have damaged the pre cat 02 sensor on that bank or the wire to it. If the oil got into the harness carrying several wires it wouldn't take much for that to be a problem.

However, the troubleshooting route you have been following should find the core issue and I don't want to interfere with that.
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  #83  
Old 06-14-2020, 01:44 PM
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Quote:
Originally Posted by upallnight View Post
The left side of the engine is Bank 2 and should be cylinder 4,5,6,7,8. Andrew will back me up on this.

If you meant left side of the engine when you face the engine then that is bank 1 wth cylinders 1,2,3,4.

If you don't know just tell us passenger side or driver side of the car, since we know that your car is LHD. That will save a lot of confusion.

Your last test you stated that you got spark with the spark tester. Did you test all the cylinders on Bank 1 or just one cylinder?

You stated that one side of the exhaust is cold compare with the other side. Is the side on the passenger side or driver side that is cold.

Since you have spark (I'm going to assume it is on all the cylinders in that bank) but that side of the exhaust is cold we can conclude that you don't have combustion in those cylinders. Next test I would perform is are the injectors firing. If the injectors aren't firing there is no gas entering the cylinder hence no combustion. The injector like the coil has 12volt and a ground signal wire. You either don't have 12 volts at the injectors or the injectors are not receiving a ground signal from the DME. It is easy to test for 12volts, not so easy to test for the ground signal unless you have special equipment like a scope or noids light. A cheap test will be with the engine running and if you have a auto mechanic stethoscope you can listen for the clicking sound of the injectors when they fire.

If you have 12volts at the injectors but no clicking sound, it time to tow it to a shop that can fix the problem. GL.
As I mentioned before it is a LHD car and the engine left is the passenger side. So there is spark at cylinder 1 for sure. I only checked cylinder 1 because cylinder 1 is included in the error list and logically if there were no problems it would not be in the list. Therefore it is very likely the rest of the plugs spark as well. I listened to the injectors already and they are clicking.

Also, I am hearing some random rattle sound from that side of the engine (passenger side, Bank1). It is not continuous though but still may point out to an exhaust issue. I could not pinpoint it since I am the only one working on it and I have to keep my foot on the pedal to keep the car running. I still need to look inside the exhaust with a borescope to see if there is some sort of blockage. Today I may also test the pressure on that side.

Thanks,

Ozzie
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  #84  
Old 06-14-2020, 05:49 PM
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It is possible that you damaged the cat when removing/installing the exhaust.
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  #85  
Old 06-14-2020, 06:08 PM
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Quote:
Originally Posted by turquise1 View Post
As I mentioned before it is a LHD car and the engine left is the passenger side.
already and they are clicking.
Ozzie

Engine left is driver's side. Left and right don't change side based on where you bare standing. Case in point. If you are facing me my right arm is on your left side it is still my right arm.
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  #86  
Old 06-14-2020, 07:45 PM
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Originally Posted by bcredliner View Post
It is possible that you damaged the cat when removing/installing the exhaust.
So an update :

I tested the pressure on bank 1 exhaust and there was simply no pressure. I am reading there should be something around 1.5 - 2 psi but there was nothing there.

I ran the car a little longer and today I saw several more errors :

-22 function, inlet camshaft control bank 2
-21 function, inlet camshaft control bank 1
-72 signal, camshaft position sensor bank 2

Since the camshaft sensors are new, those errors make me think there is really something wrong with the wiring harness or DME module is just screwed up. I have an extra DME module but I read that I have to copy the EPROM from the old one to the new one to recognize the key etc. Not sure which software is used for that (I have INPA and some others which came with it) and how it is done I am really not sure..

Thanks,

Ozzie
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  #87  
Old 06-14-2020, 08:11 PM
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Looking at forums for these set of errors, I came across this post :


https://www.bimmerforums.com/forum/s...l-bank-1-M62TU


Last time I checked (after transmission work), there were no timing chain guide pieces in oil pan. Should I look again?


Thanks,


Ozzie
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Last edited by turquise1; 06-14-2020 at 08:21 PM.
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  #88  
Old 06-14-2020, 08:15 PM
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It's not so likely for N62 to have timing chain problems like M62.

That said if the chain tensioner is not doing its job, you will have all sorts of timing issues like can cam too advanced
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  #89  
Old 06-14-2020, 08:18 PM
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Originally Posted by andrewwynn View Post
It's not so likely for N62 to have timing chain problems like M62.

That said if the chain tensioner is not doing its job, you will have all sorts of timing issues like can cam too advanced

Hey Andrew,


I have an M62 on my X5 01 4.4


Ozzie
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  #90  
Old 06-14-2020, 08:27 PM
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Oh duh I confused your case. In that case for sure check the tensioner situation. You said something about rattle right bank and thats the main symptom of weak tensioner. If you never replaced it's over due and use only OEM. Weak tensioner is enough to cause virtually all of the symptoms you described.

The errors will usually be bank one. The reason is that when the chain isn't under enough tension the cam gets advanced by the valve springs. It's very very obvious when you crank the engine by hand: each time an intake valve gets past tdc the cam SNAPS forward a good amount like 10°.
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