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jw89sho

P1336, P1309, P0340

1 post in this topic

Article No.

02-22-1

11/11/02

^ DRIVEABILITY - SURGE/ROLLING IDLE - GEAR

DRIVEN SYNCHRONIZERS - INCORRECT

INSTALLATION - CAMSHAFT POSITION

SYNCHRONIZER (CMP) INSTALLATION TOOL

CORRECT APPLICATION

^ ENGINE - GEAR DRIVEN SYNCHRONIZERS -

INCORRECT INSTALLATION - CAMSHAFT POSITION

SYNCHRONIZER (CMP) INSTALLATION TOOL

CORRECT APPLICATION

FORD:

1994-1997 THUNDERBIRD

1995-2003 TAURUS

1996-2003 MUSTANG

1995-1997 AEROSTAR

1995-2003 RANGER, WINDSTAR

1996-2000 EXPLORER

1997-2003 E SERIES, F-150

MERCURY:

1994-1997 COUGAR

1995-2003 SABLE

1997-2000 MOUNTAINEER

ISSUE

Incorrectly installed gear driven camshaft position (CMP) sensor synchronizer assemblies may be hard to diagnose. Vehicle may exhibit poor fuel economy, driveability Diagnostic Trouble Codes (DTCs) P1336, P1309, P0340 with MIL light on. Loss of power, surge, hesitation and runs rough on acceleration may also be present.

ACTION

New diagnostics have been developed for WDS to diagnose incorrectly installed gear driven camshaft position (CMP) synchronizer assemblies. Refer to the following Service Procedure to diagnose a possible mis-installed synchronizer assembly and proper installation procedure.

SERVICE INFORMATION

Items Covered In This Article

^ "Hall" vs. "VRS" sensor function

^ Vehicle history scrutiny for past service of the synchronizer assembly

^ WDS - Power balance test

^ WDS - CMP and CKP wave signal comparison

^ Wave Comparison chart - CMP vs. CKP

^ Correct (CMP) synchronizer installation tool application & installation procedure

^ "Top Dead Center" (TDC) alignment

^ Synchronizer installation tool application chart

Hall - Effect (Hall) and Variable Reluctance (VRS) CMP Sensors

CMP sensors are used on all current model year engines, regardless of fuel system or ignition system type. The CMP sensor provides the Powertrain Control Module (PCM) with cam position information to indicate # 1 cylinder, on the compression stroke

There are two different types of CMP sensors:

The three-pin, Hall-effect sensor

The two-pin Variable Reluctance sensor

Although the Hall-effect (three-pin) and the Variable Reluctance (two-pin) CMP sensors perform the same function, their signal appearance is quite different and they are not interchangeable.

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