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is there a way to fix without changing the engine control unit harness like cleaning and checking ocassionally for oil and stuff im going to change all cam sensors im pretty sure they are the reason for this as long as it recieves timely cleaning it should be fine right by the time little oil left in the cable finishes
Yes but it requires frequent inspection. Separate the ECU connector and spray both sides with contact cleaner and let it evaporate, or blow it out with compressed air. Do the same with sensor connectors and magnet connectors. Doing this repeatedly is "cleaning" the harness over time. In practical terms, the oil will never be fully removed from a contaminated harness. But you can mitigate or avoid misfires if you keep after this.
Worst case scenario of saturated harness is when a significant quantity of oil enters the ECU, and/or contaminates O2 sensors and injectors connectors. Repeated cleaning will hopefully avoid the worst case.
quick update guys i cleaned cam sensors and all the following sensors o2 sensors right bank and left bank cleaned the ecu connector but i started the car and misfire still stays and seems to only happen on idle i was checking smooth running of combustion engine on xentry and fault counter said misfires only happen on cylinder 5 on idle when the car is at a cold start and when driving it smoothens out one more thing that i noticed that uniformity of lambda right bank and left bank were both red but after i cleaned them the right bank became green but the uniformity on left one is still red the weird thing is that i did not even find oil on left bank lambda i found oil only on right side lambda and after cleaning it became green so conclusion i couldn’t get the car to idle normally even after cleaning so i dont know if its worth giving a try to change sensors yet now im thinking of changing the ecu i already got a replacement ecu from donor gle i just need to clone it im thinking that would fix it if it doesnt i dont know what to do next if just cleaning would fix the issue i would be changing all magnets, all camshaft position sensors but u dont want to throw money for no reason i also checked all fuses on engine none were bad i have a question for you guys can you guys help me find shop that could clone my ecu for cheap or some other way i could do it myself but im not going to dealership and giving them thousands of dollars. please let me know!
quick update guys i cleaned cam sensors and all the following sensors o2 sensors right bank and left bank cleaned the ecu connector but i started the car and misfire still stays and seems to only happen on idle i was checking smooth running of combustion engine on xentry and fault counter said misfires only happen on cylinder 5 on idle when the car is at a cold start and when driving it smoothens out one more thing that i noticed that uniformity of lambda right bank and left bank were both red but after i cleaned them the right bank became green but the uniformity on left one is still red the weird thing is that i did not even find oil on left bank lambda i found oil only on right side lambda and after cleaning it became green so conclusion i couldn’t get the car to idle normally even after cleaning so i dont know if its worth giving a try to change sensors yet now im thinking of changing the ecu i already got a replacement ecu from donor gle i just need to clone it im thinking that would fix it if it doesnt i dont know what to do next if just cleaning would fix the issue i would be changing all magnets, all camshaft position sensors but u dont want to throw money for no reason i also checked all fuses on engine none were bad i have a question for you guys can you guys help me find shop that could clone my ecu for cheap or some other way i could do it myself but im not going to dealership and giving them thousands of dollars. please let me know!
I had the same issues and I ended up having to bringing it to dealer where it was an actual recall of and they did some “campaign “ thing with the ecu. Oil did show a bit in it. They really need to either replace the cars with this problem. I spent $1600 on coils and plugs and sensors. Guess what. Yr later. Boom got the shakes again.
I had the same issues and I ended up having to bringing it to dealer where it was an actual recall of and they did some “campaign “ thing with the ecu. Oil did show a bit in it. They really need to either replace the cars with this problem. I spent $1600 on coils and plugs and sensors. Guess what. Yr later. Boom got the shakes again.
Thats where im at right now i changed all four camshaft solenoids they had very less oil in them still changed them ordered camshaft position sensors which are the ones that supplied oil into the harness gonna clean the harness and see how it goes from my research uniformity of lambda can be thrown off by camshaft position sensors im hoping its that mechanic told me my ecu is cooked got that changed too what did you end up doing with your car.
Last edited by Pushkar Sammi; Feb 9, 2025 at 08:36 PM.
Thats where im at right now i changed all four camshaft solenoids they had very less oil in them still changed them ordered camshaft position sensors which are the ones that supplied oil into the harness gonna clean the harness and see how it goes from my research uniformity of lambda can be thrown off by camshaft position sensors im hoping its that mechanic told me my ecu is cooked got that changed too what did you end up doing with your car.
getting a second opinion and maybe a gas can and match lol. Sorry. It’s just this car is hardly driven and regular maintenance with only 61k miles. And for it to have these issues sucks really bad. I’ve had a “specialist” say that the timing is off but he told my wife that which it’s her daily driver so I just want to get a second opinion. I just can’t see a problem popping up every other yr after they say it’s fixed. I hope you find a solution but I think I’ll be moving on from this one after I get it fixed.
damn man thats so low mileage for this problem to happen to you my car is also low mileage but its up there i have 89000 miles on mine you have the same exact issue as mine my mechanic is now saying that timing is the problem he told me no big deal though i dont think thats the case there is no codes and all camshaft magnets and position sensors dont detect anything wrong with the timing what did you do last year at the dealership that fixed your issue for a year
hey bro so i have a friend who has same issue as you his car stalled on side of highway and he changed high pressure the car has hiccups on idle did you end up fixing the issue or get the car diagnosed cause my friend is done with car he wants to trade it in to the dealer.
what color was the ml i have a bmw 528i 2014 xdrive too i just timing chain on it now my turbo is blown ac compressor also broke on me i thought doing preventitive maintenance on car would be good which left me with no money to change the turbo at the moment what happened with your n20
getting a second opinion and maybe a gas can and match lol. Sorry. It’s just this car is hardly driven and regular maintenance with only 61k miles. And for it to have these issues sucks really bad. I’ve had a “specialist” say that the timing is off but he told my wife that which it’s her daily driver so I just want to get a second opinion. I just can’t see a problem popping up every other yr after they say it’s fixed. I hope you find a solution but I think I’ll be moving on from this one after I get it fixed.
damn man thats so low mileage for this problem to happen to you my car is also low mileage but its up there i have 89000 miles on mine you have the same exact issue as mine my mechanic is now saying that timing is the problem he told me no big deal though i dont think thats the case there is no codes and all camshaft magnets and position sensors dont detect anything wrong with the timing what did you do last year at the dealership that fixed your issue for a year
getting a second opinion and maybe a gas can and match lol. Sorry. It’s just this car is hardly driven and regular maintenance with only 61k miles. And for it to have these issues sucks really bad. I’ve had a “specialist” say that the timing is off but he told my wife that which it’s her daily driver so I just want to get a second opinion. I just can’t see a problem popping up every other yr after they say it’s fixed. I hope you find a solution but I think I’ll be moving on from this one after I get it fixed.
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