Navigator 4WD V8-5.4L SOHC VIN L (1998)
Knock Sensor: Customer Interest
Spark Knock, Light To Moderate Acceleration
Article No.
00-12-3
Date:
6/12/00
SPARK KNOCK - LIGHT-TO-MODERATE ACCELERATION - 5.4L VEHICLES ONLY
FORD: 1998 EXPEDITION, F-150, F-250 LD
LINCOLN: 1998 NAVIGATOR
ISSUE
Some vehicles may experience spark knock during light-to-moderate accelerations. This may be caused by combustion chamber deposit buildups with
time or distance increasing the fuel octane requirements, resulting in detonation.
ACTION
Proceed with normal diagnostics per the Powertrain Control/Emissions Diagnosis (PC/ED) Service Manual. If spark knock on acceleration cannot be
eliminated through normal diagnostics, reprogram the Powertrain Control Module (PCM). Refer to the following Calibration Information Chart for
details.
CALIBRATION INFORMATION
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Bumper To Bumper Warranty Coverage
OPERATION
DESCRIPTION
TIME
001203A
Preprogram Powertrain
0.4 Hr.
Control Module (PCM)
DEALER CODING
CONDITION
BASIC PART NO.
CODE
12A650
42
OASIS CODES: 497000, 615500, 615600
