You could try to disconnect the throttle microswitch, but a faulty
switch will sound like a 'rev limiter' at around 1500rpm and wont let
the engine rev any higher.
if you do want to try it, the microswitch is a small white plastic
rectangular switch on the gold throttle plate on the side of the
throttle body. 2 black wires from it to a brown plug (which is where
you want to disconnect it).
If you do disconnect the overboost switch (2 wire sensor on the
throttle elbow just before the throttle body) be *SURE* to insulate
the wires as Joe said. I've seen multiple harnesses fry because of not
doing this! :)
On 9/16/05, Charles Lincoln <charlie.lincoln@gmail.com> wrote:
> Thanks August, Bill, Roger. And to add to the thread/things to consider, I
> also found a Joe Grubbs 10/10/2004 reply to:
>
> "505 turbo 85...RPM limited to 2800...What's the cause???"
>
> > Depending on how out-of-adjustment your tachometer is, it could be one of two
> things: the normal 6500 RPM rev-limiter, a shorted overboost switch, or a
> failing throttle microswitch.
>
> > Disconnect the throttle microswitch (the one with the two-terminal connector)
> and see if the problem goes away.
>
> > Also try disconnecting the overboost switch, and isolate the wires for it so
> they don't short together or to a ground.
>
> > If you use the throttle microswtich adjustment as a "prop-the-throttle-open"
> idle speed adjustment, you will cause the throttle microswitch to fail
> prematurely.
>
>
>
>
>
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Received on Fri Sep 16 13:57:36 2005
