1993gt5.0

It started as ano spark at all sometimes then it was fine for a while then it did it again and I tore into it and replaced the pickup coil, the cap and rotor and spark plugs andwires and then the ignition module and tested coilalso thats fine. but I noticed the last time this happend when Iloaded it on toa trailer and while my friends pushed the car thetach acked like it was shorting out or something because it wouldn't even register at all beforewhen I tryed to start it and it jumped a few times and started upand it did it again when we unloaded it.
does anybody have any Ideas