went to jano's oddkidd and when he put the computer on the only fault was the tps and co's abit high. we checked the car over and set the tps then took it for a road test, ran realy good but on the way back the fault came on again and the car started to backfire and make some big bangs, when we looked the tps had droped to 0% again and its ment to drop to 1% when you let off the throttle.so we set it again and it ran well untill i got home but its started again. am thinking where the throttle body shaft goes into the tps, the the tps will have worn away cos it a metal shaft into a plastic sensor. thanks for the help