rmank. Should be easy. You can get a specialized MAF cleaner at an autoparts store, it just comes in a spray can like brake cleaner. Just take off and disconnect the MAF and use the spray to clean it. Spray a few times, let it dry, repeat, especially if you have an oiled air filter. Only takes around 5-10min. In this video, you will learn 5 signs of a bad mass air flow sensor (MAF SENSOR). Watching this video will help you diagnose to see if it's time to replace o Here are the most common symptoms of a bad or failing MAF sensor: Idle Issues – Your A4 may run rich or lean when idling, or it may also idle erratically. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture. The exhaust color is usually darker when running rich. A lean condition is when there is too Air charge sensor for E39, E46, Z3 Brand: ES#: 4475884 Mfg#: 13621432356 Qty: Availability: Back Ordered Mass Air Flow Sensor (MAF) Here are some common symptoms of a bad or failing throttle position sensor to watch for: 1. Car won’t accelerate, lacks power when accelerating, or accelerates itself. It may feel as though the car simply doesn't accelerate as it should, and jerks or hesitates as it picks up speed. It may accelerate smoothly, but lack power. As the rpm increases, the voltage should increase. to as high as 4.7v. You must do this with the vehicle running, because the maf in the e39 is a hot film type. This means that the DME applies 12 volts to the sensor and heats it to 200 degrees above ambient temperature. This is where the 5v signal wire comes into play. jHNGmH. Here are the most common symptoms of a bad or failing MAF sensor: Idle Issues – Your Flex may run rich or lean when idling, or it may also idle erratically. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture. The exhaust color is usually darker when running rich. A lean condition is when there is too This MAF fits BMW E46, E39, and Z3 models. Mass Air Flow Sensor (MAF) for BMW E46, E39, and Z3 – Clickable Automotive Made in Germany by VDO and repackaged by VEMO, this Mass Air Flow sensor ensures your engine can accurately calculate the correct air/fuel ratios. The car has been running perfectly, and fuel mileage has been consistent. Dealership diagnosed a mass airflow sensor fault. They want to replace it for $645. Two months ago the car had the intake system dismantled for carbon-buildup walnut shell blasting. Could a sensor failure be somehow related to the carbon buildup, or its repair two months ago? Here are the most common symptoms of a bad or failing MAF sensor: Idle Issues – Your A4 may run rich or lean when idling, or it may also idle erratically. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture. The exhaust color is usually darker when running rich. A lean condition is when there is too Open loop, and closed loop. Closed loop runs off preset values, while open loop takes in additional info so that it can vary the fuel map for optimum power and fuel efficiency. If you disconnect the MAF, then the car runs in closed loop. If you have it connected, it runs off the MAF sensor and other sensors.

e46 mass air flow sensor symptoms