Fulltext TSBs

Technical Service Bulletins

TSB
98-21-21
  • IDLE – FAST IDLE SPEED AND/OR DIAGNOSTIC TROUBLE CODE (DTC) P1506 STORED IN MEMORY – VEHICLES BUILT WITH 4.6L, 5.4L, OR 6.8L ENGINE
  • MALFUNCTION INDICATOR LAMP (MIL) – MIL ILLUMINATED AND/OR FAST IDLE SPEED WITH DIAGNOSTIC TROUBLE CODE (DTC) P1506 STORED IN MEMORY – VEHICLES BUILT WITH 4.6L, 5.4L, OR 6.8L ENGINE
  • LAMP – MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED AND/OR FAST IDLE SPEED WITH DIAGNOSTIC TROUBLE CODE (DTC) P1506 STORED IN MEMORY – VEHICLES BUILT WITH 4.6L, 5.4L, OR 6.8L ENGINE
Publication Date: OCTOBER 19, 1998

LIGHT TRUCK:
1997-1998 ECONOLINE, EXPEDITION, F-150, F-250 LD
1998 NAVIGATOR

This TSB article is being republished in its entirety to add service parts, include a Part Application Chart, and to revise Figure 1.

ISSUE:

The Malfunction Indicator Lamp (MIL) may illuminate and Diagnostic Trouble Code (DTC) P1506 may be stored in continuous memory and/or the engine idle speed may be higher than expected. This may be caused by black plastic flash from idle air bypass hose becoming lodged in the Idle Air Control (IAC) bypass valve.

ACTION:

Refer to the Diagnostic Flow Chart (Figure 1) for diagnostic and servicing procedure.




Figure 1 – Article 98-21-21


PART NUMBERPART NAME
F65Z-9H308-ACIdle Air Control Resonator (4.6L F-150/F-250, Expedition, Econoline)
F75Z-9H308-EDIdle Air Control Resonator (5.4L F-150/F-250, Expedition/Navigator)
F7UZ-9H308-HCIdle Air Control Resonator (5.4L Econoline)
F81Z-9H308-JBIdle Air Control Resonator (6.8L Econoline)
F65Z-9F715-EAIdle Air Control Valve (4.6L F-150/F-250, Expedition)
F6AZ-9F715-ABIdle Air Control Valve (4.6L Econoline)
F75Z-9F715-AAIdle Air Control Valve (5.4L F-150/F-250, Expedition/Navigator)
F7UZ-9F715-CAIdle Air Control Valve (5.4L Econoline)
F7UZ-9F715-EAIdle Air Control Valve (6.8L Econoline)

OTHER APPLICABLE ARTICLES:

NONE

SUPERSEDES:

98-13-17

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage

OPERATIONDESCRIPTIONTIME
982121APerform TSB Diagnostics (Includes Replace Idle Air Control Resonator And Inspect Or Replace Idle Air Control Valve) – Vehicles Built Before 4/15/980.8 Hr.
982121BPerform TSB Diagnostics (Includes Replace Idle Air Control Valve) – Vehicles Built After 4/15/980.5 Hr.

DEALER CODING

BASIC PART NO.CONDITION CODE
9H30842

OASIS CODES:

206000, 608000, 608400, 619400, 698298


Copyright © 1998 Ford Motor Company