Mechanics

FORD F-150 BODY PROBLEM

2002 Ford F-150 • 150,000 miles

I am getting several codes, P0171, P0174, P0303, and P0316. I am trying to figure out if the cylinder misfire is causing the system too lean errors, or if the system too lean condition is causing the misfire.
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Calebwagner
December 22, 2012.



Check the pcv hose at the back of the throttle body

303 missfire number 3, 316 is missfire under 1000rpm on cylinder 6.

My thought are a bad intake manifold. It leaks coolant into the boots, gaskets leak causing lean codes.

Roy

ASEMaster6371
Dec 22, 2012.