just replaced the head gasket on the passenger side. put it back together and its shaking with error codes P0012 and P0022 Camshaft Position Timing Over-Retarded. Did not have these codes before. Checked the timing very carefully while resembling. but must have done something wrong. But what?
Please help... Thanks
Its a 2007 F150 XLT 5.4 3v 8 cylinder Engine