I HAVE A CODE FOR P174 AND P171. on 2004 Ford F-150 Heritage

TRUCK RUNS ROUGH AND THE TRUCK SHUTS OFF. SOMETIME IT MISSFIRES AND HAS LOW POWER. ALRIGHT REPLACED THE MAF SENSOR.

by in Kayenta, AZ on August 19, 2012
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1 answer
ANSWER by , August 20, 2012
look for vac leak at pcv hose, very common issue other than that it could be several issues