Understanding Fuel & Ignition Maps

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You don't need a degree to understand fuel and ignition maps. Learn about understanding fuel and ignition maps with help from an expert in the automotive industry in this free video clip.

Part of the Video Series: Car Maintenance Tips & Tricks
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Video Transcript

Hi, I'm Bob Holcomb from Apex Automotive in Great Barrington, Massachusetts. We're going to talk to you on your vehicle's map sensor, or manifold atmosphere pressure sensor. This device measures the pressure inside your intake manifold. It uses the outside pressure against the inside pressure of the manifold. To determine fuel mixture, timing, can position and things of that nature. The outside pressure is going to hover somewhere around 29.29 inches of mercury. Inside the intake manifold, the pressure is going to be lower as your engine has a pump. As it's sucking the air through the intake, the pressure lowers, the computer reads the pressure. And then, can determine the proper amount of fuel to put in your engine. And that's a brief description of what a map sensor is. I'm Bob Holcomb from Apex Automotive in Great Barrington, Massachusetts.

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