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- IDLE - HIGH IDLE SPEEDS - THROTTLE STICKS AFTER STEADY STATE DRIVING IN COLD AMBIENT TEMPERATURES - VEHICLES BUILT THROUGH 12/1/97 EQUIPPED WITH 4.6L ENGINE
| Publication Date: OCTOBER 13, 1998 |
| 1997-1998 EXPEDITION, F-150, F-250 LD |
The vehicles identified in this TSB article should be equipped with an insulated PCV tube that was installed in production or under Recall 96S59. This insulation provides protection from PCV backflow due to ice in the PCV system created during steady speed driving in extremely cold weather. In those extreme cases where the insulated PCV tube does not completely eliminate throttle body icing due to PCV backflow, a service kit has been developed that will make these vehicles even less susceptible to PCV freezing.
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