THIS TRUCK HAS CODES 0171 AND 0174, BUT RUNS OK WHEN COLD. AFTER IT WARMS UP IT LOOSES POWER AS THOUGHT A CAT IS BLOCKED. WE CHANGED THE INTAKE GASKETS O2 SENSORS AND FUEL FILTER, also did a bg injector cleaing and fuel filter. it will run fine for quite awhil...

FIX posted 9/23/2011

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