Went to change my spark plugs on 94 toyota pickup 22re efi because it was time,before I changed the plugs I didn't hear a clicking but when I put the new plugs in one at a time so i wouldn't mix up the spark plug wires then i put it back together went for a drive and everytime i hit the gas i can hear a clicking sound any idea what could be the problem.

 

Sounds like you have a wire that's not snapped on;

Or you could have a short somewhere else in a wire. Had this happen to me, and got zapped when I touched my dizzy.