Navigator 4WD V8-5.4L DOHC VIN A (2000)
Compression Check: Customer Interest
Engine - MIL ON/Multiple Misfire Codes Set/Low Power
TSB 06-5-13
03/20/06
ENGINE MISFIRE WITH DIAGNOSTIC TROUBLE
CODE (DTC) P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308, AND P0316.
FORD:
2003-2004 Mustang, Mustang
LINCOLN:
1999-2004 Navigator
2002-2003 Blackwood
2003-2005 Aviator
MERCURY:
2003-2004 Marauder
ISSUE
Some 1999-2004 Navigator, 2002-2003 Blackwood, 2003-2005 Aviator, 2003-2004 Marauder and 2003-2004 Mustang vehicles built before 12/19/2004
equipped with 4.6L 4V/5.4 4V engine may exhibit a runs rough, lacks power, and engine misfire, prompted by a MIL light and DTC codes P0301
P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0316.
ACTION
Diagnose engine for engine misfire concern. If diagnostics determine an engine misfire which is characterized by leakage through exhaust valve(s), only
replace the affected cylinder head(s).
SERVICE PROCEDURE
FOR VEHICLES WITH RUNS ROUGH/MISFIRE
CONDITION:
1.
Perform relative compression check on all cylinders. If abnormal, check cylinder leakage and actual compression for "low" cylinders refer to
Workshop Manual (WSM), Section 303-00.
2.
If leakage/compression check indicates a valve train concern, per valve train diagnostics in WSM, Section 303-00, replace cylinder head and cam
assembly, pipe plugs and timing chain tensioner, per procedure outlined in WSM, Section 303-01.
