Changed switch on clutch pushrod that runs to clutch mastercylinder. It is an ignition interlock switch(push down on pedal to start truck). This didn't seem to solve my problem of having to mash the pedal down as hard as possible 2 or 3 times to get the starter to engage. The switch body bottoms out against another piece of formed plastic that rides around the plunger rod. Can this be shimmed? Has anyone experienced this before? any other adjustment in the system? Thanks, Dean