How does the computer system in my car work?

Well, that is a loaded question.

There is a somewhat simple answer and it may help you understand the basics of most automobiles made since the late 1980’s.

As most of us know, an internal combustion engine needs three things to run. Air, fuel and spark. Prior to the days of computers, fuel was provided via a mechanical (or sometimes electric) fuel pump to a carburetor. The natural vacuum (technical term is manifold pressure) would draw the fuel into the engine via Bernoulli’s principle. The air fuel mixture would be compressed in the cylinder and ignited by the spark plug. You probably know the rest of the story. If not look here.

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Welcome to my site!

I grew up on a farm in northeast Iowa in the ’60s and ’70s. From as early as I can remember I was fascinated with anything that was self propelled. I was begging my dad to let me drive the tractor from the time I was five years old. He finally relented and let me when I was around eleven. The first tractor Dad let me operate was an old Allis Challmers WD. That had a hand clutch that was pretty easy for a kid to operate.

I could barely muster up the energy to depress the clutch pedal on our 1940’s era “M” Farmall but I was determined to do it nonetheless. That was the next tractor Dad let me drive. Dad sold that tractor in 1973, but has since bought another as a collector.

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