HARD START COLD ENGINE

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THIS TRUCK WHEN COOL OR COLD STUMBLES & HESITATES TO START FUEL PRESSURE 60 T0 66 PSI COLD & HOT. MASS AIR FLOW CORRECT ,TPS CORRECT, MAP CORRECT, REPLACED THROTTL BODY, HOOKED UP BATTERY CHARGER, SAME THING, DID A INJECTOR DROP TEST ALL PASSED WITH SAME DROP IN PRESSURE,PULLED POST O2 SENSORS NO DIFFERANCE, ALL PAREMATERS SEEM NORMAL, LONG & SHORT TERM FUEL TRIMS NORMAL, CATS DONT SEEM TO BE CLOGED