On 9/26/2007 6:28 AM Richard A Jones wrote:

>> We know that the ECU
>> decides that a low Pin 4 + rpm < 1500 means kill the fuel.
>
> Mike:
>
> Is this a typo or do you have it backwards in your mind?
> rmp GREATER than 1500 means kill the fuel.  See Bentley
> 24.33.
>
> Also, the ECU knows rpm from the Hall sender.  Bentley
> 24.31.
>

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.

--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR