F 250 2WD Super Duty V8-7.3L DSL Turbo VIN F (1999)
If the noise is only present when engine is hot, and:
a.
no performance concern exists
b.
fuel pressure is above the minimum specification of 379 kPa (55 psi)
c.
there is no air present in the fuel/oil system
d.
a long lead injector is currently not installed
then the engine is a candidate for a special Injector, F81Z-9E527-EARM (engine s/n 661894 - 896811) or XC3Z-9E527-AARM (engine s/n
896812 - end of 7.3L production).
NOTE
IF THE NUMBER EIGHT INJECTOR HAS BEEN REPLACED PREVIOUSLY FOR A CACKLE NOISE CONCERN WITH PART
NUMBER NOTED ABOVE, DO NOT REPLACE IT AGAIN. THE LONG LEAD INJECTOR CAN EXHIBIT A TICKING "LIFTER"
NOISE AT NORMAL OPERATING TEMPERATURES. THIS IS CONSIDERED A NORMAL CONDITION AND DOES NOT REQUIRE
SERVICE.
NOTE
THE ENGINE SERIAL NUMBER CAN BE FOUND ON THE LOWER LEFT SIDE OF THE ENGINE BLOCK REARWARD OF THE
OIL FILTER.
NOTE
THE NEW LONG-LEAD INJECTOR FOR "CACKLE" NOISE IS USED ONLY IN CYLINDER # 8. DO NOT USE IN ANY OTHER
CYLINDER DUE TO FUTURE CYLINDER CONTRIBUTION TEST DIAGNOSTICS BEING AT RISK. THE INJECTOR IS
RECOGNIZABLE BY AN "LL" STAMPED ON THE SOLENOID WHERE THE UVC (INJECTOR HARNESS) CONNECTS.
