I had problems with the car hesitating once in a while(check engine light on). you would be able to put the car in park or neutral, kill it, then start it right back up, problem gone. but then the it got to where it would hesitate and then not go above 2k rpm. had codes read and it was cam shaft position sensor, replaced and still have the same problems. The car takes awhile to finally start, and never gets above 2k rpm without backfiring throught the intake. I checked the voltage to the sensor and reads 5v. not sure what the problem can be. PLEASE HELP!!!! any advice would be great!!!!!!!

 

how many miles does your neon have? i'm having similar issues (check my thread)