I have a 1991/1992. It a Frankenstien jeep. anyway a few days ago it decided it did not want to run right. it idled real rough almost sounding like a built V8 in stead of 2.5L 4 cly and also drove much in the same matter. i just did new plugs cap/rotor and wires. still runs rougher then all hell. When I unplugged the throttle position sensor it smoothly idled up then when right back to the same routine. when plugged back in, there is no change. So i am wondering if the Throttle sensor can cause this and if not than what? also my Fuel pump is now audible which it never before this happened. PLEASE HELP! thanks!