Скачать с ютуб Rough Idle and run BMW E90 2008 N53 Gasoline в хорошем качестве

Rough Idle and run BMW E90 2008 N53 Gasoline

Here's an example of my current issue with my E90. Explanation of what had been done and changed below. full post on forum here: Hey all, I Have the following issue with my 2008 - E90 - N53 - gasoline Engine - 150.687 km. When i start the car is starts up fine with a stable idle at 700 rpm but from the moment i raise the RPM above 1500rpm and let it drop back down it can't hold te stable 700 rpm anymore. Engine then proceeds to roughly run at idle in an rpm range between 500 - 900 rpm. and it stays like this with a warm and with a cold engine. Cold start or warm start doesn't make any difference. Starts up smooth everytime, only starts running unstable once throttle has been applied and rpm's drop back to idle. I checked the codes with Carly and it threw following codes: F29DC - Cylinder injection cutout F2A2D - Fuel low pressure system, fuel pressure F2B05 - Nitrogen-oxide sensor, heating After checking the freeze frame data i noticed that the LPFP was only supplying 0.8 Bar to the HPFP. I proceded to replace the LPFP which seemingly solved the problem, on the first start it held rpm at idle after revving it up and dropping back down. But when i restarted the car and raised the RPM to 1000 rpm the engine started jerking again when it dropped back down to idle again in a range between 500 - 900 rpm. Checked codes again but now i only get: F29DC - Cylinder injection cutout F2B05 - Nitrogen-oxide sensor, heating i've tried resetting the engine adaptations via carly but that also didn't seem to fix the issue. But here comes the interresting point of the case, when i disconnect the airmass sensor on the air intake the whole problem dissapears. Could the rough running and injection issues be a symptom from a bad MAF sensor? other weird thing is that normally when you disconnect the MAF sensor it throws on the check engine light which it doesn't seem to do now for some reason? The nitrogen sensor shouldn't be the problem in my eyes because it has been throwing this fault for about 2 years now and a new sensor is way too expensive and i don't do a massive amount of km's so i don't really care about fuel efficiency and since its a '08 Euro4 car it doesn't get emmission inspections anymore anyway. In the meantime i already ordered a new MAF sensor, should arrive in 4 days. Am i Wrong thinking its not the injectors? since it starts up fine and smooth and the problem only appears once you've applied throttle. Little update: Replaced MAF sensor and the problem persists. i've done some searching around for mesurements in my OBD scanner and have seen that the not smooth value for Cylinder 1 & 6 are about 100 times higher then the other 4 (59260µs for CYL1 and 60117µs for CYL6, other Cylinders are around 2000 to 3000 µs). Went to my local mechanic for some extra help and was told that i might be a bad coil or spark plug on Cylinder 1 & 6. Now i switched places for the coils, moved coil 6 to 5 and coil 1 to 3 but the problem persists. With moving coils the not smooth values stay as high for CYL 1 & 6 and the rough running still persists. also checked the spark plugs but these visually look OK. just to exclude problems with these i'm replacing all 6 coils + 6 spark plugs. Updates will follow soon. Another little update: All 6 spark plugs + coil packs have been replaced. problem is still not fixed. Tested all 6 coil packs and spark plugs by disconnecting them while engine is at a stable idle and with all 6 cylinders i hear and feel a change in engine noise and vibrations which means all 6 cylinders are working, injecting fuel, getting air and make the fuel go boom. After that i put the engine in limp mode by kicking the gas pedal once and performed the same test again. now when i disconnect cylinder 1 & 6 it makes no audible or vibration difference. when i pull 2, 3, 4 or 5 the engine almost dies. so cylinder 1 & 6 are for sure the problem childs. After that i did a little test drive while resetting the faults while driving and i've noticed something interresting. As long as the engine stays at the same RPM (cruise control on highway) i can reset the faults and all cylinders keep working properly without any fault codes in the entire car. from the moment i slow down or speed up cylinder 1 & 6 start shitting themselves again. When cylinder 1 & 6 stop working it throws these fault codes again: F29DC - Cylinder injection cutout F2B05 - Nitrogen-oxide sensor, heating The obvious thing you'd think would be an injector going bad so as a test i switched injector 5 & 6 and also switched injector from 1 & 2. now here's the kicker it still disables cylinder 1 & 6 with the original "problem" injectors moved to a different slot. So the current diagnosis is: its not the MAF sensor. its not the spark plugs. its not the coil packs. its not the air intake and its not the injectors.