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Aziz540

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About Aziz540

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    E34 540

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  1. Hi Dongoiv, these were last replaced a couple of months back, hadn’t driven much since, quite a lot of idling for diagnosis purposes. - May try to change again? Mileage is currently around about 178,000. Thank you.
  2. Hi all, Hope you are well, just getting to the bottom of some long-term issues I’ve had with the 540, im left with it starting fine, but with a high rpm at idle, this happens for about 2-3 mins. After this time rpm’s drop lower and I face a misfire, it then seems like trying to correct this, rpm’s rise again, and this cycle repeats! Any ideas on the root cause? Some notes: - when I unplug MAF, engine cuts (tried cleaning same result) - when I unplug fuel pressure regulator vacuum hose it doesn’t make any changes - when I remove oil filler cap, no changes also. Did change the PCV, fuel pressure regulator, ICV, throttle position sensor, intake temp sensor and performed smoke test after MAF with no luck. Any ideas much appreciated (only codes I am getting using my scangenie is oxygen sensor bank 1 and oxygen sensor control bank 2)
  3. Aziz540

    E34 540 - left bank not firing

    Maybe an ECU swap? https://www.ebay.co.uk/itm/BMW-E34-E31-E38-M60-V8-Engine-Control-Unit-ECU-1744605/290754991456?hash=item43b2591560:g:v1sAAOSw43pckpv5 I read on the forum below: Also.. I may have to unplug the o2 sensors? This would make it run closed loop correct? And this way I can see if it is the o2 sensor/lambda control as these are the codes I’m getting.
  4. Aziz540

    E34 540 - left bank not firing

    Thank you all for the help, sadly still getting these issues, managed to change the fuel filter and new set of injectors (changed the fuel pump a couple years back) same issue, no noticeable difference to idle when removing the left side ignition plugs. Any additional thoughts would be much appreciated! - really unsure which direction to look into next.. also is it normal that engine cuts off when removing MAF sensor? It does this only when the misfire occurs. Thanks,
  5. Aziz540

    E34 540 - left bank not firing

    Just another note: I removed my cats as I ruined a new aftermarket set because of the one bank not firing- so can rule that out - figured I’d solve the issue before thinking about new ones. thanks
  6. Aziz540

    E34 540 - left bank not firing

    Hi People, hope all is well, just writing back in regards to this issue! I thought I had solved it... but after a few nice drives i am back with one bank still not firing... i have replaced cam sensor, intake temp sensor, idle control valve, throttle positioning sensor, PCV, and every seal on the air intake/ intake manifold and still no luck - when I replaced the o2 sensors with Bosch it was running fine.. then it warms up, still fine.. until I push it a little, then starts to misfire and when accelerating feels lumpy and gurgly, I check and the one bank (passenger side) is not firing. I then disconnected my battery and after 20 mins or so started it up and everything was fine for the drive home, until again I pushed it a little and one bank goes, this in turn is ruining my o2 sensors because of the fuel and causing a code to be thrown on the #1 passenger side, I’m on my second set. My last hope is to gain some insight from you all, as I believe it may be the ecu? Thank you,
  7. Aziz540

    M60 only firing on one bank! any idea's?

    Thank you for the reply, ive got the same issue! I have changed the o2 sensors, same issue, then changed the camshaft sensor and got the same issues, - when I reset the ecu (disconnecting the battery for a while) all is fine - not sure what else to do.. next step is ecu replacement? Thanks, Kind regards,
  8. Aziz540

    M60 only firing on one bank! any idea's?

    Hi, Hope you are well, i know this was a while ago, but I am experiencing similar issues, please could you confirm which o2 sensor is plugged into which connector? is it the right sensor into right connector? And left into left? Thank you!
  9. Aziz540

    E34 540 - left bank not firing

    Thank you all for the help! - I cannot say how much I appreciate it, was losing hope, done the above, replaced all the intake manifold seals & PCV, along with all the sensors & it’s no longer throwing any codes! Engine runs ok, but think I need some new cats, - I might go to ‘Hard knocks speed shop’ in Oxford, this will hopefully sort out the slight misfire I currently have, noisy all around the exhaust with a spitting type sound when I rev, . - any where else anyone can recommend? Thanks again all,
  10. Aziz540

    E34 540 - left bank not firing

    Hi all, managed to get ahold of an OBD, the car starts and seems fine, gets a little warm and idles very bad - it’s throwing codes: Oxygen sensor control #1 And “C6” as a code for the scangenie, which I’m not sure as it’s not on the code sheet and finally oxygen sensor 2 this is unexpected, as I changed the two sensors recently, however may be a result of the misfiring damaging them again. Any ideas would be great, I think I will start at locating and fixing the leak.
  11. Aziz540

    E34 540 - left bank not firing

    Just fired up after leaving the battery disconnected for a couple days - it seemed to run better, not 100%, but better, it then slowly went back to the bad misfire when warming up.. hoping it’s not the cylinder walls - anyone know where I can source an OBD? Thank you,
  12. Aziz540

    E34 540 - left bank not firing

    Thank you all for the input, really appreciate it - I was hoping it wasnt the end of the engine, will try get ahold of an OBD to see if any codes are thrown for the sensors etc.
  13. Aziz540

    E34 540 - left bank not firing

    Thank you all for the advise, will check this and report back, I just need some hope that it’s not the end of the car! Some one advised me it may be the timing chain?
  14. Hi All, just wanted to get some some opinions on an issue I’m having with the 540 - any ideas would help! I was driving, fuelled up, and all of a sudden the car started misfiring badly, and looks like there’s an oil leak on the underside left side too. The fuel injectors seem to be fine, along with the coils and spark plugs. The car is misfiring very badly, and checked compression and found these figures: left bank - 8-10 bar (120-150psi) right bank - 10-12 (150-180) Any ideas on the issue? thanks
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