Since that time there have been three major versions of VANOS systems and multiple variations. If the error messages regarding NOx system. Part 1. For example, if one cylinder will receive only 75% or necessary amount of air (previously mentioned difference of 0.2 mm for one valve), other cylinders will have to work with the lean fuel mixture. The first group of defects: faults, detected by DME. Note: misfire data is available for N54 (MSD80) and N55 (MEVD17.2) series engines. The same situation will be reached if both inlet valves are moved only 100 microns (0.1mm) less than necessary! I have bmw 325ie90 model 2006 and i want to change the oil engine so how many gallons it need YOU HAVE E46 MODEL 325I 325XI 325CI 325IC E90 MODELS YOU HAVE E90 - 335I 335XI 328I I DID NOT SEE 325IE 90 MODEL.I WILL GET BACK TO YOU. Rough run data will display the sequence of cylinders, displayed on the screen. HAYNES: BMW 3-Series 2008-2012 - ISBN: 978 0 85733 901 0, 3. Dealers attempt to sketch you for EUR 6000? A Stratified charge doesnt reduce fuel consumption? The cost of NOXEM NOx emulator is lower than the cost of NOx sensor, the average lifetime of it at least 300000 km, and there is no need to replace the expensive NOx catalytic converter! In addition thanks to lower fuel consumption, NOXEM NOx emulator will fully payback after 30000 .. 40000 km. Obviously, after repairs (and deleting of the error messages), performed before, re-adaptation of the engine is not performed. As already mentioned before, in idle the valves are opening for (average) only 0.4 .. 0.5 mm (min opening allowed is 0.18 mm)! To turn and fix the eccentric shaft, its convenient to use the Valvetronic motor (it has to be disconnected), slowly screwing it in the anchorage or turning its axle. This method allows finding a valve(s), which openings are significantly different (typically the valve openings will be smaller for the cylinder, which mechanical efficiency is decreased) from conditions of small opening of valves (idle). 11787565447. This diagram can help if you print it out and store it in the vehicle for future reference, such as a breakdown situation. N43/N53 E and F series, E series. If the engine smoothes out the idle (works in full functionality mode), directly after starting the engine, the disbalance, displayed by Rough run data, should be increased, during several tenths of seconds situation has to improve (disbalance has to decrease). BMW E90 engines have many fasteners that cannot be reused. Valvetronic changes (reduces) the opening of inlet valves and allows the inlet valves to perform as an individual throttle of each cylinder. As we know, repair specialists of dealer centers have only ISTA D available (INPA is not allowed for use), and it displays only Rough run data (and also without any explanation and status bits for example, is/not the idle evened, is/not the min/max range reached, does the positive value means increased or decreased efficiency, is it mechanical or chemical efficiency etc). Part 2, Persistent vibration in Homogeneous mode. Heavy iron-cast cylinder block was replaced by lighter aluminum alternative with iron-cast sleeves. Nuances of NOx catalytic converter, How to use test module of the Lambda probes, Performance tests of CO catalytic converters, Performance tests of CO catalytic converters. Conclusion the cylinder No.4 has significantly decreased mechanical efficiency, other cylinders are displaying similar efficiency their performance is correct. In this situation switch off the Valvetronic and check, is the problem actual also then: a) memorize approximate Rough run data (cylinder(s), which mechanical efficiency in decreased); c) disconnect the Valvetronic sensor the engine will switch to emergency mode (without using Valvetronic); If the problem has disappeared Rough run data shows even performance of cylinders, we can assume, that the problem exists in the mode when the valves have a small opening (attention this IS NOT a confirmation, that the Valvetronic is the cause of the problem, description will follow); if the problem is still present, obviously, the Valvetronic IS NOT the cause of the problem. Problems with NOx system also can be the reason of: error messages relating (individual or all) cylinders misfires; low efficiency of CO catalytic converter, 1st/2nd Bank; Lambda probes; incorrect fuel trim (cylinders individual or Bank). NOx emulator NOXEM 129 | 130 | 402 developed for BMW N43 & N53series engines, an alternative for OEM NOx sensors 11787587129 | 11787587130 | 11787590402, solves problems with NOx catalytic converter and NOx sensor, 325i | 330i | 523i | 525i | 530i | 630i (E series). Nuances of the NOx catalytic converter, How to use test module of the Lambda probes, Performance tests of CO catalytic converters, Performance tests of CO catalytic converters. What is the difference between NOXEM NOx emulator and OEM NOx sensor? Viewing data with INPA (ISTA confirms Rough run data data are correct): Rough run data showed: around -1.3 .. -1.8 units for cylinders 1, 2 and 3, and +3.0 .. 4.0 units for cylinder No.4. DME controls the voltage, supplied to the motor (the Bridge type controller is used to manage the voltage the voltage can change the polarity) and current, consumed by it; b) position of the eccentric shaft is controlled by very accurate Holl sensor module, which is placed at the end of the shaft, near the first cylinder. The installation of NOXEM NOx emulator is quick and simple, it doesnt require intervention in the electronics and exhaust system. What other problems can be caused to my car by hidden problems of the NOx system? Part 1. Stratified charge performance check. a) motor (1) is a regular DC motor, connected with 2 pin connection. BMW E60 LCI, E61 LCI with N53 and N43 series petrol engine. Part 2, Importance of the service procedures. Uneven running. BMW N42B20 engine reliability, problems and repair. Pelican: Replacing your drive belt E90, (c) 2008-2020 BMWSections.com. When removing the auxiliary belt, it is advisable to take a picture of the pulley positions to aid refitting. More detailed information, how does the Valvetronic works, you can find in the aftersales materials of BMW AG, in this entry I will pay more attention, how to detect defects of Valvetronic. Where could be the problem? Detecting the localization of the defect: a) press the inlet valves of good and damaged cylinder one by one, to feel their movement; b) ask the assistant to start the engine for some seconds in the necessary moment; c) repeat a and b activities, slowly turning the eccentric shaft, till valves of any good cylinder start to open. If the amount of air is regulated with inlet valves, not throttle, there is no air shortage in the inlet manifold the air is not sucked out, and pumping losses are avoided. 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