I have an 01 Intrepid with a 2.7 vin R that is not starting, I changed the cam and crank sensor and the timming chain, still wont start. I tested fuel presure and ignition pulse both are good. the car has a black key. The inresting thing about this problem is it stars and runs good when I unplug the cam sensor. I cant figure this one out, has any one seen this before?? Thanks for any help.