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If the idle switch is always closed you would not likely rev past the fuel decel cutoff set at 1200RPM. But a problematic intermittent idle switch would result in fuel cut at RPMs above 1200. I have seen bad idle switches, actually just saw one last week.
If you unplug the switch you will just remain in the Part Throttle maps and idle high, other than that no harm done.
If you want to see exactly how a shorted out (always closed) switch behaves, simply unplug it and jumper the 2 pins in the harness. Then try reving it past 1200RPMs, I bet lunch it dies and sputters right around the 1200RPM area.
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Sal
1984 911 Carrera Cab M491 (Factory Wide Body)
1975 911S Targa (SOLD)
1964 356SC (SOLD)
1987 Ford Mustang LX 5.0 Convertible
Last edited by scarceller; 03-17-2016 at 03:25 PM..
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