full throttle microswitch

[Delorean17@xxxx]

Hi,
When the full throttle microswitch on my car is depressed it does not do 
anything (on my last car the RPMS went up slightly when depressed). I have 
an automatic and the car does down shift when floored but the separate full 
throttle switch doesn't seem to be working. I replaced the switch and I 
still don't get a change in RPMS when it is depressed. If it isn't the 
switch what else could it be? The Frequency valve is buzzing so that is 
working fine. The car runs perfectly but I would like to get this fixed for 
passing purposes;). Any help would be greatly appreciated.

Thanks
David