Technical Service Bulletins
|Publication Date: October 1, 2004|
|1997-1998 F-250 LD|
Some 1997-2003 F-150 vehicles equipped with any engine, and 1997-1998 F-250 LD vehicles equipped with the 5.4L engine, may exhibit a ticking or knocking noise coming from the catalytic converters. The noise may be described as sounding like a diesel engine. The condition will be present when the vehicle is in gear at idle only, and is more pronounced when the vehicle is stationary, such as sitting in a drive-through line. The noise is normal, and is created by engine pulses being amplified through the light-off converters.
DO NOT replace converters unless loose internal components are found. To reduce the noise, install a wrap kit on each of the light-off converters. Refer to the instruction sheet included in the kit.
|PART NUMBER||PART NAME|
|4L3Z-5E258-AC||Exhaust Shield Kit|
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
|042006A||Install Wrap Kit On Both Light-Off Converters (Includes Time To Perform Road Test)||0.7 Hr.|
|BASIC PART NO.||CONDITION CODE|