![]() ![]() However, when parts of your BMW have failed or are poorly cared for, your BMW will feel like it has lost its power that is to say that acceleration feels slow and forced. Rough AccelerationĪ luxury car like a BMW should always accelerate smoothly and tightly without any type of struggle. Listed below are some of the most common symptoms you should be aware of: 1. There are a variety of different symptoms which can contribute to the running of your BMW being described as rough. So why settle for anything less? Symptoms of Rough Running ![]() You invested your money in a car known for its peak performance and amazing driving experience. Remember, when you bought your BMW, you chose a luxury car. Rough running is entirely preventable and should always be remedied where possible to prevent more extreme symptoms from occurring. It is a common misconception that this is simply a symptom of an aging vehicle and should be seen as nothing more than a minor annoyance. If you live in a sandy or dusty area, maybe invest in a prefilter sock you can remove and clean.Rough running, also known as rough idling may happen when you are an intersection or at a red light and your BMW’s engine makes sounds, becomes shuddery, or will then have slow acceleration when attempting to accelerate. They can go for a LONG time between cleanings. If you think the filter has just enough oil, it probably has too much.Īnd don't clean the filter too often. If at all possible, get one with a spray oil. +1000 on don't touch the MAF sensor wire.Īlso if you have any type of oiled filter, pick up a cleaning/re-oiling "recharge" kit. I use CRC MAF cleaner as well, every time I clean and re-oil the filter. The worse that the MAF is off, the worse your car will run. The ECU will dink with fuel ratio, timing, or who knows what else to compensate for what it sees as leaner air. Example: maybe you drive your car at sea level but the ECU thinks you are at 5600 feet elevation. That throws off the air density readings, which in turn change what the ECU does. It's from extra oil on the filter getting into the air intake stream and contaminating the MAF "hot wire". MAF getting messed up from an oiled filter is not from extra contaminants getting in. ![]()
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