Engine - High Idle Speeds/Throttle Sticks

Article No.
98-21-10

10/26/98

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

LIGHT TRUCK:
1997-98 EXPEDITION, F-150, F-250 LD

ISSUE
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.

ACTION
Verify that the condition is not caused by throttle body sludging, throttle cable binding, or interference between an improperly positioned floor mat and accelerator pedal. If no other conditions are identified, replace the PCV hose and throttle body adapter provided with the appropriate service kit. Refer to the Instruction Sheet included in the kit for installation details.

PART NUMBER PART NAME

F85Z-6A603-CB Service Kit - 4.6L Romeo Engine
F85Z-6A603-AB Service Kit - 4.6L Windsor Engine

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage

OPERATION DESCRIPTION TIME

982110A Install Service kit 1.1 Hr.

DEALER CODING
CONDITION
BASIC PART NO. CODE
9E926 42

OASIS CODES: 404000, 610000, 610600, 612000, 612600, 617400, 619400