E90 learner

So, my car has a jolt and hard shift after changing transmission oil. After a year, I check the net and youtube, they fix it when resseting the adaptation. I tried to reset the adaptation and car went smooth acceleration is ok and stuff. But after a month, car will jolt as if somebody bump to you at the back. Sometimes, when during traffic stop (Traffic light is red), it jolt like somebody bump you. If you do nothing, it gets very worst. From just during hard brake, it will not jolt from acceleration from 2nd to 3rd gear and from 3rd to 2nd gear. If you reset it again, It will come back to smooth again. Then after a month or more it will go back to it. It will happen fast if you are driving the car like 30 minutes or more. I was thinking disabling the NIC (Neutral Idle Control)? Or need to check my fluid level? I remember when changing my radiator, the mechanic also remove the small radiator which is connected to the radiator. Maybe it is no longer optimum? Thanks.

Go ista or inpa. Blaming myself for not using it sooner.

Topaz/bapmic bought from OZ. My AC blower is topaz already 5 years old and counting. Maybe i am just lucky with the vvt motor or vice versa. Any way to check the VVT motor before opening my car again? Can I use my car with VVT malfunction? My old VVT motor has 2a67 Valvetronic , internal fault and 2a6b valvetronic,powerlimitation,servomotor.

Just an update on this. Try to relearn vvt motor end stops. VVT motor wont do it. So I open the car engine again. And behold, the worm gear is in the Maximum to the counter clockwise direction. Put back my original VVT motor and do the relearn and relearn successful. Put the new VVT motor again and try to do a relearn and failed. So I put back my old VVT , relearn stops and Car starts and run now. When the worm gear is on maximum on the counter clockwise? What angle is that? Car wont really start with that position. When doing a relearn, the worm gear in relation to the worm shaft,there is like 5 teeth of the gear on the right side. (That position will start the engine). Observation. When you pressed start the engine without pressing brakes, the VVT motor will really moved. It seems like the NEW VVT motor could not moved correctly to the point where the computer wants it so does the error.

What position is the shaft, where it is fully open so that it can start again?

I just switch ignition 2 and wait for 10 minutrs. Would that calibrate the end stops?

My E90 n46 won't start 2 days after I changed the VVT motor. I tried to start the engine for a long time and suddenly engine lights comes on, 2a67 Valvetronic , internal fault and 2a6b valvetronic,powerlimitation,servomotor. Car cranks good and just that. Did starting my engine long destroyed my new vvt motor? My vvt motor destroyed my engine as well? Tried to remove the Eccentric shaft sensor plug. Then start the engine it only shows error 2a59 2a55 -- eccentric shaft sensor. Put the plug back again and error is gone. Still wont start. Remove and reinsert the VVT motor's electric plug. Engine won't start. When inserted the new VVT motor, I press the start button to ignition 2 (Engine not idling) and wait for a long time and hear lots of sounds from the engine. Then started the engine idled for 15 minutes. Test run the car running it in the Motor way for more an hour and everything wents smooth and ok. No vibration in idling, rpm no longer going up and down etc. Then after 2 days, wify called , car just cranks and wont start. When I start the engine (crank long), I can smell gasoline fume. RPM goes up. Now i don't know what to do. Can ultra grey silicon damage your engine when some of it go to the engine? Any help would be appreciated ty.

I could nit move my chain. So it means that this is still good?

Thank yoi

Is this normal when short driving? Or there is a leak somewher? Like oil coolant mix?

I want to replace my VVT motor actuator. But checking on the DIY there is this thing called BMW Three bond sealant to be place on every half moon shape on part of my n46 engine before putting back the valve cover. Is there an alternative for that sealant? Thank you. https://youtube.com/clip/Ugkx3xath8-lk1vlYVEa42xK-iFRcwQJHIa4

Hello, Anyone tried to disable the valvetronic system on N46? I was planning to just disable it. In the net, some say it is good and some say it will just do a limp mode. Any experience guys? Thank you.

Hello , what is the cause of this problem 2a59 and 2a67? Car sounds weird, and has intermittent cyclic rattle inside the car. I cleared it and it went ok after I just switch the car on without pressing breaks?

Okay, Pressing the start button on my n46 e90 without pressing the brakes. Just left it like that. Notices that I heard the throttle body adjusting. Also hear a lot of other noises from the engine and after sometime it all stop no more noise. Is that normal?

When I checked it, it has like oil on the left side of the plug not all of it. Not full. So do you mean, my rough idle at cold start could also be cause by the sensor? Replacing a shaft sensor is not a DIY job .... bummer. My rpm on the dashboard is not erratic up and down though. 1k rpm some noticeable shake then at 800. Normal no movement on the needle pointer.