tachometer mystery?

[Cuog]

I dont agree entirely

I think every car on the US market has been fuel injected for some time now. The engine controller (computer) holds the engine at the idle RPM when you have your foot off the gas. It compensates for air temp, engine temp, air pressure, the load on the alternator, and keeps the engine at its proper idle speed.

the on/off button on the air conditioner is just another input to the engine controller.

also, on most cars, when you accelerate with the pedal all the way to the floor, the engine controller turns the A/C off, because you obviously want full power to the drive train (or you wouldnt be mashing the gas pedal).

My Saturn Vue has a electic gas pedal. There is no cable to the intake butterfly, its controlled by the engine computer. (and my Vue is by no means an expensive vehicle: $14,500 new).

I adressed that in the fancier post that i originally posted but i had accidentally closed the browser and didnt feel like typing it again. Yes some newer cars infact the number is increasing do more "thinking" for throttle input but many cars(my experience with new cars runs till 2000 on Jeeps so try not to hold that against me) but what i posted earlier is mainly exident in less advanced fuel injection and carbueration not so much on todays more electronically controlled machines