Code po356 keeps coming on, I put in a new coil the code came on again so i move the coil to another cylinder hope it would follow, no it stayed po356, i even changed the spark plug still po356 i even moved the injector still po356. I need HELP!!!

 

Get a voltmeter and measure the voltage on the wires in the connector which may be bad.
With the ignition switch in Run you should see 12v on the input pin, RD/LG.
With the connector on the COP probe the output lead for 12v getting thru the coil, which should be the OG/YE wire.
You could slide a paperclip into the connector alongside the wire to test.
The 12v goes to the PCM on the OG/YE wire to complete the circuit at the right times to fire the coil, but I don't have the diagrams for your year PCM to tell which PCM connector/pin that wire goes to.

 

R&j thanks for the response.
I have changed both wire clips on the coil and the injector.
this problem comes and goes at any speed.
I even cleaned the wire harness by the firewall as well

 

Oh sry i need to say the truck was struck by lighting and i changed the cpu with a used one but the dealership reformatted the used ones and reprogrammed it

 

So obviously it's a wiring issue. You'll have to test the wires all the way back up to and including the PCM connector.

 

It sounds like a broken wire that is barely making contact when the vehicle is moving.
You need to trace the 12v from (I think) fuse #30, thru the coil, to the PCM connector.
If that is all good the grounding chip in the PCM may be blown.

 

have you checked , or replaced the Cranks Shaft Position sensor? or its connection?

 

No i haven't but i will.
i will get back to you soon.