RAM 3500 Truck 4WD V8-360 5.9L VIN 5 Magnum (1998)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine - Spark Knock on Acceleration
NUMBER: 18-05-00 Rev F
GROUP: Vehicle Performance
DATE: September 15, 2000
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-05-00 REV E, DATED SEPTEMBER 01, 2000 WHICH SHOULD BE
REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE AN EMISSIONS PACKAGE
UPDATE TO THE TABLE.
SUBJECT:
1998 Model Year Engine Spark Knock
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration level 98Cal12 and
98Cal12C)
MODELS:
1998
(AB)
Ram Van
1998
(AN)
Dakota
1998
(BR/BE)
Ram Truck
1998
(DN)
Durango
1998
(XJ)
Cherokee
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A GASOLINE ENGINE. SEE THE TABLE FOR SPECIFIC APPLICATION.
SYMPTOM/CONDITION:
Some vehicle engines may exhibit a light-to-moderate spark knock condition during acceleration (under load).
DIAGNOSIS:
1.
Verify that the following NOTE(S) have been reviewed and completed as necessary.
2.
Verify that the engine coolant contains the correct mixture of a quality antifreeze to water. The coolant mixture should consist of 44% to 68%
antifreeze.
3.
If the only condition seen is the light-to-moderate engine spark knock, perform the Repair Procedure.
NOTE:
VERIFY THAT TSB 18-48-98 HAS BEEN COMPLETED.
NOTE:
THIS FEATURE WILL NOT COMPENSATE FOR HEAVY SPARK KNOCK CONDITIONS. IF HEAVY KNOCK IS EXPERIENCED,
FURTHER DIAGNOSIS AND TESTING WILL BE REQUIRED. REFER TO TSB 09-05-00 FOR ADDITIONAL ASSISTANCE.
NOTE:
WHEN PULLING A HEAVY LOAD OR DRIVING A FULLY LOADED VEHICLE USE A PREMIUM UNLEADED FUEL TO HELP