When you turn the key on all the dash lights come on execpt the check engine light it will not start. when it does come on it will start and run fine. When you turn it off it may not start for 2 or 3 days. rebuilt pcm new crank ps new cam ps new o2 sensors tuned up 1 year ago had been running fine the onset was all of the sudden.any ideas?

 

Will it start in neutral? If so, it's your neutral safety switch!