"REPUBLISHED AUGUST 2013. ISSUE:
FUEL INJECTOR CONCERNS, (APPLICABLE TO 5.0 AJ133 GASOLINE ENGINES), LEADING TO POTENTIAL PROBLEMS SUCH AS POOR RUNNING, POOR FUEL ECONOMY, HARD STARTING, ROUGH IDLE, MISFIRES AND ENGINE DETONATION. CUSTOMER SYMPTOMS MAY INCLUDE THE ENGINE CHECK LAMP ILLUMINATED WHICH MAYBE ACCOMPANIED WITH A MISFIRE/ENGINE VIBRATION AT IDLE.
MISFIRE CODES (P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308, P0316) ARE STORED IN THE PCM
DEPENDENT ON THE AFFECTED CYLINDER(S).
CAUSE:
POOR FUEL QUALITY OR FUEL CONTAMINANTS RESTRICTING THE FUEL INJECTOR FLOW RATE."
