replaced pcm roughly two years ago,vehicle did star and run but error code p1336 did appear but vehicle did run with no problems,recently the van would not start agian,read cam correlation sensor so i replaced to no avial,now reads crank position sensor,spoke with another mechanic he suggested ignition control module,so changed this out today,no help scan tool still reads no pulse width,but i have spark to the plugs,scan tool shows rpm signal,but for the life of me will not start,scan tool shows all values as fine it seems accept nopulse width is this passlock problem or something else any body have similiar problems in the past,PLeaSE hElp