Ive put 3 oe sensors in it a new ecm new pigtail new battery new wiring to ecm. New ect sensor. New battery cables. And runs good for a couple days then throw crank position range slash performance code. I dont know whats going on anly one have any ideas. When it throws the code it slow starts. But it will crank up fine sometimes and when it does crank it runs great. Im so confused

Battery voltage sitting is 12.6. Charginging voltage at back of alternator is 14.3

But when pluging my matco scan tool voltage at obd port is only 11.54. Weird

What code(*) are you getting?

Code is p0335