MAF versus MAP speed density

Description

[@johnwoolfrey5093]

Richard, I want to applaud you for being such a patient man. Your see-saw explanation of fuel trim was a very good visual analogy. /John

[@syo_nara1916]

Really good info and analogies.... BUT GEEZE! You got some hard heads over there!

[@man-e4g637]

I remember when i was a young buck and learning like these guys. Good teacher. Great vid👍🏼

[@stickman-1]

The instructor is wrong on the first question. Sensors measure. ECU's calculate.

[@fuzz992]

Not correct. To my understanding, sensors on a car are generally transducers or RTDs that send a voltage to (or back to) the ecu. Inside the ECU, the voltages are transformed and converted into usable digital data which is processed, stored and compared to maps (more processing) which is then used for trim calculations. Since measuring is literally the comparison of one object against another object or a known reference, this absolutely occurs in the ECU. No matter which way you look at this, the ECU is the device doing the measuring. Sensors give data. ECU measures the data. Then the ECU calculates the needed trim to stay in ranges specified in the maps. I could be wrong on this, as I'm not a mechanic. However, I know what the word measure actually means. BTW, he didn't even give the answer to the first question. He left the students with 2 choices: Weight or Volume.

[@Super032208]

Thank you for the info

[@geojor]

good info, thanks...

[@benjaminlowrey3186]

It introduces unmetered air

[@jctyoga]

A1 on Wednesday!

[@georgebonney90]

👍

[@userer4579]

08:16 How old are the students in this class? FFS, that kid sounds like has never heard of the term "inches of mercury" and he obviously has no idea what the instructor is talking about. That's basic 7th or 8th grade science . I'm sure he will end up in a dealership somewhere. Is the general population of young adults this ignorant of basic physical science?

[@McCuistian]

Some of them are still in high school, and they don't teach ANY of the stuff in school now that they used to.

[@Creaturemotorsport]

I have seen lean bank from melted catalytic converter, and multiport EGR system with clogged ports. The long & short of it. A few dollars more. The good the bad and the ugly.

[@irench]

You've got the symptom and causality backward. What is this Clint Eastwood yapp. a few dollars more good bad ugly... all of which means zilch thus assuring the rest of the KZbin world is that much stupider for listening to you. I highly suggest you give away any tools you've purchased and stick to folding paper airplanes assuming you can figure out that their isn't anti gravity dust on the paper.