What is an air flow meter (Afm); how would you recognize it and what does it do?
Did you know that as you press the accelerator to go faster in your car so you allow more air and fuel into the engine. All this takes place under the bonnet or hood but how is it controlled? Well the Afm is an important component in regulating the whole of fuel injected into the machine of a modern car so all modern petrol and diesel engines have an Afm.
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As you go faster (press the pedal) the Afm senses that more air is flowing and tells the engine's brain (Ecu) which then instructs the injectors to pump more fuel. It's a bit like running faster or up a hill; your brain senses your muscles need more oxygen; your heart rate rises and you breath faster.
Engines with carburettors (remember them?) do not need an Afm because the carb itself regulates the whole of fuel and air going into the engine. So when your machine management panel indicates a fault in the Afm you'll need to find it and replace it. This can often be done without master tools and using a bit of 'savvy', base sense and a workshop manual..
Look for the air intake opportunity to the engine. This is usually plastic, shaped a bit like a small trumpet. Succeed it to the air filter and usually you will find the Afm either in the filter box or clipped into the pipework going to the engine.
Most Afms have a 12 volt (not dangerous) electrical plug into them which is unquestionably disconnected.
What are the different types of Maf used in modern cars and how do they work?
The earlier type of Afm (eg Bosch Jetronic) used a vane or flap inside the meter body; as air passed by it opened the flap. A spring then returned the flap towards terminated position when the machine speed slowed down. These vane types are cumbersome and costly to make. Later types of Afm are often called Air Flow Sensors and work on a hot wire system; air flow (over the wires) is measured by how much current is required to keep one of the wires at a predetermined temperature. Look inside and you can usually see two filaments; these have to be thin to portion accurately the speed at which air is flowing into the engine.
Which clubs make air flow meters? Are there pattern copies on the market? former tool fitted to European cars is made by clubs like Bosch, Siemens and Hella and, yes there are a lot of pattern copies on the market. Depending on your budget you may prefer to fit a genuine replacement.
How will you know if your Maf has failed and what effects will failure have on the execution of your car? The easiest indication is, of course, the malfunction light showing on your dashboard! ordinarily the car will start but will run erratically and may even cut out, using more fuel and performing poorly.
How easy is it to convert the air flow meter yourself?
Fortunately it's an easy job, requiring no special skills or tools. Often the meter is plainly clipped into place or held with torx or hexagonal bolts.
Car Air Flow Meters - Identify, Troubleshoot and Cure Petrol Or Diesel Air Flow Meter ProblemsThanks To : video games Store Motorcycle Store