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Subject:Re: The two throttle valve switches, redux
From:Richard A Jones
Date:Wed, 26 Sep 2007 09:03:32 -0600

> Oh wait -- that's the problem!
>
> If rpm greater than 1500 + idle switch closing means kill the fuel, then
> how does the ECU know to richen the mixture when the full throttle switch
> is closed? As I have been saying over and over, they both connect to the
> same ECU pin (pin 4). It can't tell the difference between the idle switch
> and the full throttle switch. They are wired in parallel and either one
> will ground Pin 4.

Add knowledge from the AFM which reflects throttle position.

Richard