The performance mass airflow sensor replaces your OEM sensor and improves on mileage and can increase horsepower by 13. This performance MAF sensor increases airflow by up to 45% and low-end torque.
Table of Contents
What are the symptoms of a failing MAF sensor?
- Black Exhaust. One sign that your vehicle’s MAF is going bad is black exhaust from excess fuel.
- Check Engine. A faulty mass airflow sensor is a common reason why a check engine light comes on.
- Hard Starts.
- Hesitation.
- Poor Gas Economy.
- Rough Idle.
- Trouble Accelerating.
What does the mass air flow sensor do on BMW?
A mass airflow sensor for a BMW measures the oxygen flowing to your engine for the perfect air-to-fuel ratio. The mass airflow sensor increases the efficiency of your engine, resulting in optimized performance and enhanced fuel economy. Modern cars use a hot-wire type of airflow sensor.
Is it better to clean or replace a mass air flow sensor?
MAF sensors can become damaged, but more often they just get too dirty to do their job well. In this case, they can be cleaned but if it is a mechanical or electrical failure, they must be replaced.
What does a bigger MAF sensor do?
When you increase the diameter of the piping, you allow more air to flow over the 0-5 volt MAF sensor without overwhelming it with more air than it is designed to read through the change in electrical current as air passes over it.
How long does a BMW MAF sensor last?
Mass air flow sensors are designed to last the lifetime of your vehicle. In fact, they have no scheduled replacement interval. For this reason, the sensor is generally not replaced until it fails.
Can I drive with MAF sensor unplugged?
Yes, you can run a car without its MAF sensor, but it’s not recommended, because the car will not run nearly as well and will get horrible fuel mileage.
Does cleaning MAF sensor work?
It is a good idea to clean the MAF sensor every time you change or clean the air filter. A clean MAF sensor can restore 4-10 horsepower to the wheels, which is a significant number for just cleaning a sensor.
Will a bad MAF sensor throw a code?
Often, when there’s an issue with the MAF sensor, your car’s primary computer—often referred to as the powertrain control module (PCM)—will turn on the check engine light and store a diagnostic trouble code (DTC) in its memory.
Can a car run without a mass air flow sensor?
Without a proper signal from the mass air flow sensor, the powertrain control module (PCM), which manages the engine, transmission, and other systems in your car, won’t know how much fuel the engine needs. This can either cause the engine to run too lean (too little fuel) or too rich (too much fuel).
When I unplug my MAF sensor car runs better?
The MAF sensor measures air weight in grams per second and air temperature and if either of those two are off then the ECU may command a leaner or a richer mixture. By disconnecting the sensor the ECU switches to limp mode and the car may idle better .
What should I do after replacing MAF sensor?
- Turn the engine off.
- Find the negative terminal of the battery.
- Use a wrench to loosen the negative terminal nut.
- Remove the negative connecting point.
- Repeat the process with the positive terminal of the battery.
- Disconnect the battery.
How do you test a mass airflow sensor?
Pop the hood open. Lightly tap the MAF sensor and electrical connector with a screwdriver handle. Wiggle the wires as well. If the engine stalls, idle is upset, or idle gets better, the MAF sensor is likely defective.
Can you use WD 40 to clean a mass air flow sensor?
DO NOT USE WD-40. Use a cleaner that is meant for electrical parts. Brake cleaner is essentially the same stuff. I’ve also used something called ‘thottle body cleaner’ whose label indicated it was safe for cleaning MAF’s.
Can I use throttle body cleaner on MAF?
Yes, you can use a MAF cleaner on a throttle body, but you cannot use throttle body cleaner on a MAF. The MAFs are very particular. If you use the wrong kind of cleaner on the MAF sensor and it leaves a residue, it can burn a little wire if it’s a hot-wire MAF sensor.
Can you upgrade a MAF?
Do I Really Need to Upgrade? If you’ve already modded your engine to increase air flow, you should upgrade your MAF. Your stock unit is probably not equipped to gauge a bigger volume of air, and this will entirely throw off its signals.
Does K&N filter damage MAF?
We are aware of the “urban myth” created by a few dealerships that a vehicle’s MAF sensor can be contaminated by K&N filter oil. No evidence has ever been provided to support this “myth” and years of diagnostic testing by K&N has shown that not only is this allegation not real, it is not even possible.
What is the best mass air flow sensor?
- Delphi Mass Air Flow Sensor. Delphi AF10043 Mass Air Flow Sensor.
- Denso Mass Air Flow Sensor. Sale.
- GM Genuine Parts Mass Air Flow Sensor. GM Genuine Parts 213-4222 Mass Airflow Sensor with Intake Air Temperature Sensor.
- Hitachi Mass Air Flow Sensor.
- JDMON Mass Air flow Sensor.
Does cleaning MAF sensor improve MPG?
How often should a MAF sensor be cleaned?
We recommend that you clean the MAF sensor every time you change your air filter. Here’s how: Before going to the store, pull off the air duct between the air filter box and the throttle body to see how the MAF sensor is anchored. If you see Torx screws, buy a Torx tool and a can of CRC Mass Air Flow Sensor Cleaner.
How often should a MAF be replaced?
A mass air flow typically last between 80,000 miles to 150,000 miles. Proper maintenance of the mass air flow and cleaning it will help prolong its life. However, there are a few vehicle symptoms that will tell you when it is time to replace the air flow sensor. The first symptom is hard starting.
Can BMW drive without MAF sensor?
It’s just an additional sensor to fine tune the engine calibration, but the car still runs fine without it. It’s just open loop operation instead of closed loop. You’ll probably lose some efficiency but won’t damage anything.
Can a mass air flow sensor cause transmission problems?
The Mass Airflow Sensor measures airflow into the engine intake assembly and is used to determine engine load. If it fails it can cause automatic transmission problems such as late harsh shifts, early soft shifts, or can result in no shifting at all.
Can MAF sensor cause misfire?
Even a dirty MAF sensor can cause a lean code and/or misfire to occur. The engine may be stalling because it isn’t getting enough throttle opening.
Can you use rubbing alcohol to clean MAF sensor?
And of course you don’t need to rub off the sensors since the alcohol will remove the grim by itself. Be sure to get the isopropyl alcohol into the grannies as well as the nooks on the air flow sensor. These are the parts that need to be cleaned the most.