Truck has been a menace in the last year!!

Had a misfire problem:
Replaced plugs, wires and coils. Problem was a broken spring (Fixed by my mechanic):Replaced all springs in the bank, checked compression and other vitals.

Accel 457S - Plugs
MSD 32039 - Wires
MSD 82568 - Coils
K&N Air Filter (Put in when we bought it in 06)

Shortly thereafter is threw Cam sensor position error so I replaced the sensor. Not 50 miles later is started stuttering again and threw the following errors:
PO315
PO339
PO300

Just as a note, shortly before the cam sensor error all but the rear passenger side turn signals stopped working. The signal switch has been replaced and been through extensive research and testing to no avail yet.

So, before I take it back to the mechanic, anyone want to throw out some more suggestions?

 

My manual says:
PO300- Multiple cylinder misfire
PO339- Crankshaft position (CKP) sensor intermittent

My manual does not have a code PO315. Maybe the new sensor was bad too. Sorry that's all I got. I'm sure more knowledgeable folks will chime in.

 

check your grounds......battery main, fender connection, engine to frame....9/10 times intermittent issues are ground related.

Take back to mechanic....he did not diagnose and fix.....he just threw parts at it and didn't test it.

 

Bad Sensor or the pick up ring came loose.... Causing it not to be able to Phase itself....

 

Put copper plugs, 5.7 doesn't like fancy plugs.