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Misfire and clutch

Tiny
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Here are the numbers you requested and more, at optimal engine temperature.
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Wednesday, October 30th, 2019 AT 8:47 AM
Tiny
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Attached.
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Wednesday, October 30th, 2019 AT 8:49 AM
Tiny
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Welcome back:

The computer is trying to adjust bank 1 to compensate for a lean mixture. The STFT should be close to 0 and the positive (high) number indicates it's allowing the injectors to stay open much longer than normal which is most likely the cause of issues on bank 1. Are you certain there are no vacuum leaks or even an exhaust leak pre catalytic converter?

Joe
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Wednesday, October 30th, 2019 AT 5:57 PM
Tiny
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I will double check again.
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Wednesday, October 30th, 2019 AT 6:59 PM
Tiny
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Let me know what you find.

Take care,
Joe
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Wednesday, October 30th, 2019 AT 8:46 PM
Tiny
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Nothing. If I remove the harness to the MAF sensor I saw a code for it plus one for the intake air temperature sensor, but I don't have one on this engine. Cleaned the MAF and put it back and plugged it. Do these readings look right? The engine is up to normal temperate. Also after clearing the codes I have none now but the oxygen sensor before catalytic converter bank 1 code is present.
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Thursday, October 31st, 2019 AT 7:38 AM
Tiny
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And I just checked the values on the oxygen sensors. Do these look right?
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Thursday, October 31st, 2019 AT 7:53 AM
Tiny
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Welcome back:

It is based on how long the vehicle was running. They can go up to about.9v with a rich mixture when cold but should level out to aprox.45v when at operating temp.

So, one of the pics is higher than the other. If that was before warm up, no problem. The other is really close to normal, which should be after warmed up.

I hope this helps.

Take care,
Joe
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Thursday, October 31st, 2019 AT 7:40 PM
Tiny
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As I indicated the engine was fully warm. I also noticed that one at 4.5v and the graph also shows that it sometimes move and others its solid line.
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Friday, November 1st, 2019 AT 4:54 AM
Tiny
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Replaced the bank 1 before cat oxygen sensor and now reads 1.3 just like bank 2 before cat, and both after cat reading around.7, so far so good, crossing fingers, if that doesn't fix it I assume this was one of the issues, because the oxygen sensor is real black and was reding 4.5v all along, I just don't know why they reading 1.4 and not in the range of.1-.9 while warm.
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Friday, November 1st, 2019 AT 2:04 PM
Tiny
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Welcome back:

It sounds like you found the problem. Let me know if things change.

Take care and have a good weekend.

Joe
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Friday, November 1st, 2019 AT 9:48 PM
Tiny
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Drive it since yesterday and no issues. Went to clean it up left it running for 2 hours and then I started hearing that noise from the throw out bearing and I knew then check engine would come on. It did, and it was misfire on 2, 3, and 4, doesn't make sense. Now I am thinking this knocking noise is throwing off the knock sensor, no other explanation, o2 volts still good, I delete the code and this knocking sound goes away.
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Saturday, November 2nd, 2019 AT 10:23 AM
Tiny
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Welcome back:

Is it possible for you to record the sound so I can hear it? Also, when you delete the code, does the noise go away?

Joe
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Saturday, November 2nd, 2019 AT 11:37 PM
Tiny
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I will record it, when I delete the codes and restart everything is normal, no noise.
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Sunday, November 3rd, 2019 AT 5:02 AM
Tiny
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Welcome back:

Interesting. So, we get a mechanical noise from an electronic device. I will watch for your reply. I would like to hear it.

Joe
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Sunday, November 3rd, 2019 AT 5:17 PM
Tiny
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The noise is in the throw out bearing I assume because it goes away when I press the clutch pedal, so not electrical device, mechanical yes, I forgot to do it today, will do tomorrow.
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Sunday, November 3rd, 2019 AT 5:24 PM
Tiny
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Okay, now I understand. I thought you meant that when the code was deleted, so was the sound.

I will watch for your reply.

Take care,
Joe
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Sunday, November 3rd, 2019 AT 5:29 PM
Tiny
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Yes that too, I have worked on many BMW's never seen such thing before.
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Sunday, November 3rd, 2019 AT 5:37 PM
Tiny
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I have to be honest, I haven't either. That's why I am so interested in hearing it. Wish I was there to work on it with you. That would make things easier on me. LOL

Take care and I will watch for your reply,

Joe
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Sunday, November 3rd, 2019 AT 5:52 PM
Tiny
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I know, if the noise didn't go away with the pedal pressed. I would have thought its knocking, and the crazy thing which that the noise goes away after the misfire codes are deleted.
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Sunday, November 3rd, 2019 AT 6:02 PM

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