PCM - Engine Spark Knock While Accelerating: Overview

Article No.
00-10-3

05/15/00

SPARK KNOCK - WHILE ACCELERATING IN
TEMPERATURES OF 32 DEGREES C (90 DEGREES
F)

FORD:
1998-1999 CROWN VICTORIA

MERCURY:
1998-1999 GRAND MARQUIS

ISSUE
A spark knock may occur while accelerating in ambient temperatures greater than 32C (90F) on some vehicles. This may be caused by an inoperative cooling fan and/or too much spark advance commanded by the calibration when operating in high ambient temperatures.

ACTION
Check the operation of the high and low speed cooling fans, and if necessary reprogram the Powertrain Control Module (PCM) and/or adjust the timing using NGS. Refer to the following Service Procedure for details.





Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.

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

OPERATION DESCRIPTION TIME

001003A Reprogram Powertrain 1.3 Hrs.
Control Module (PCM),
Perform Octane Adjust
Procedure And Check
Operation Of Cooling Fans
(Also Includes Time To
Test Drive To Check For
Spark knock)

DEALER CODING
CONDITION
BASIC PART NO. CODE
RECAL 42

OASIS CODES: 497000, 615000, 615500, 615600, 702000, 702100