sounds like a cam sensor, try going to a pick and pull junkyard for that if your not wanting to pay for a new one. buying a used one from a junk yard would be the best bet if your not sure that is the issue. Also, if there is more than one neon there I would grab all the sensors you can. bring pants with deep pockets
Iceman CAI, 55mm TB, P&P intake, Indy head w/1mm oversized Valves, Crane 14 cams, Pacesetter headder, OBX LSD, Unorthodox UDP, Solid bobble strut. solid front motor mount. prothane motor mounts. Battery in trunk, KYB-gr2 w/Eibach Sportline Springs, Eibach Sway Bars, Every bushing replaced with Prothane bushings.