Help i have a 93 dodge write a few times before was having problems with stuttering or surging whatever you want to call it, my truck bucks basically hold steady throttle when driving, wont do it when im parked and rev and hold the rpm, i have replace the following, 02 , tps, map, icu, distributor, plugs and wires only have a 1000 miles on them , fuel filter,and cleaned the egr system, im at a loss, maybe a fuel problem of some problem, its a 93 dodge 318 multi port fuel injection....any help ? oh and no codes are coming up just 55