SOLVING BMW 525I (E39) MYSTERY MISFIRE

SOLVING BMW 525I MYSTERY MISFIRE
If you would like to help support this channel please take a look at these tools I recommend and use daily.
Streamlight usb rechargeable pen light (affiliate link) amzn.to/3GxgWtl
Automatic noise cancelling ear protection (affiliate link) amzn.to/3Q7ZiPZ
Reasonably priced metric wrench set. (affiliate link) amzn.to/3GvIkHV
Excellent 1/2in drive split beam torque wrench (same as snap on) (affiliate link) amzn.to/3Z5qu67
1/2in long impact socket set, I've been using this set for 15 years and haven't broke one yet (affiliate link) amzn.to/3jJcrmv
Thank you and thanks for watching

[@andrewduncan9210]

Quality diagnosis. When the job outfoxes you, you are the go to solution! I wouldn't have suspected exhaust back pressure causing misfires. Good job!!

[@EuropeanAutoRepair]

Thank you, I appreciate that

[@justaman5490]

Load up the parts cannon or get a diagnosis...The choice is yours.

[@EuropeanAutoRepair]

Hahah exactly!

[@bradynthor9015]

The one I’m working on at the minute isn’t running 4/5/6 cylinders at all got spark got fuel got air however if I take the lamda sensor out it doesn’t do anything and the manifold cat is stone cold any ideas

[@EuropeanAutoRepair]

You have good compression, spark and fuel and bank 2 is not contributing at all?

[@Gonçalofilipe-y4g]

Very good vídeo, did you fix the problem?

[@EuropeanAutoRepair]

Actually I don’t think I did end up fixing the issue, the customer declined the repair if I remember right hah, thanks for watching

[@samkehntshangase391]

Mine has the similar issue though it doesn’t have cats

[@EuropeanAutoRepair]

Hmm, just misfires on one bank?

[@Messergebnis-liebhaber]

Great channel but low views. I hope it will grow bigger. What do you do exactly as an Automotive Technician and what is the difference between a mechanic and a technician?

[@EuropeanAutoRepair]

Hey! I appreciate that! A think a technician implies a little more technical diagnosis capability maybe but I’m honestly not sure and I’ll answer to either one of those, thanks for checking out my videos

[@dnxb1t]

Sometimes you gotta take it to the pros!

[@EuropeanAutoRepair]

Thanks man!

[@ansjdbdbdkdjn]

Check fuel pump.

[@maxjet38]

Nice video, however did you fix it? what was the after "gage" reading? Was the valve cover actually cracked? warped? did the customer really needed it? Got image of the "restricted" cat?

[@EuropeanAutoRepair]

Yeah I definitely could have provided more info, it was just a quick video showing something to look out for, at idle back pressure at the pre cat 02 sensor should be nonexistent

[@dkrawk8309]

Very odd.I personally have never seen m52 or m54 with failed cats

[@EuropeanAutoRepair]

Yeah me neither, was definitely a strange one