Engine - High Idle/PCV System Causing Throttle Icing: Overview

Article No.
01-20-1

10/15/01

^ IDLE - HIGH IDLE AFTER STEADY STATE DRIVING
IN EXTREME COLD AMBIENT TEMPERATURES -
VEHICLES EQUIPPED WITH 4.2L ENGINE BUILT
THROUGH 1/24/2000

^ ENGINE - 4.2L - PCV SYSTEM ICING - AFTER
STEADY STATE DRIVING IN EXTREME COLD
AMBIENT TEMPERATURES - VEHICLES EQUIPPED
WITH 4.2L ENGINE BUILT THROUGH 1/24/2000

FORD:
1997-2000 F-150

ISSUE
Some of the vehicles produced through 11/13/1996 identified in this TSB article should have been serviced under recall 97S96 or 98R04. Vehicles produced after 11/13/1996 have production level coolant heated fittings in the Upper Intake. In those extreme cases where throttle body icing due to PCV backflow is not completely eliminated, a new designed heated PCV valve has been developed that will make these vehicles even less susceptible to PCV freezing and the possibility of throttle body icing.

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, check for evidence of PCV system backflow by inspecting the inside of the clean air tube at the PCV closure hose connection for the presence of moisture, oil, or oily stains. If evidence of system backflow is found, recall 97S96/98R04 should be performed (if required) and a new production level heated PCV valve assembly should be installed. Refer to the Service Procedure for details.





Parts Block

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

OPERATION DESCRIPTION TIME

012001A Install New PCV Assembly, 0.9 Hr.
And Water Outlet Tube
012001B Install Recall Service Kit, 2.1 Hrs.
And New PCV Assembly

DEALER CODING
CONDITION
BASIC PART NO. CODE
6758 55

OASIS CODES: 499000, 608000, 608600, 619400