XJ-6 L6-4.2L (1983)
Fuel Pressure: Technical Service Bulletins
Tools - Fuel Injection Pulse Duration Tester
September, 1984
ITEM:
J84/46
SUBJECT:
KENT MOORE PULSE DURATION TESTER
MODEL:
XJ6 & XJ-S HE
A tester for measuring the duration of the electrical pulse to the injectors is available from Kent Moore Tool Division. The part number is J-33915.
The tester is useful as an aid in the diagnosis of fuel injection malfunctions, however, it should be stressed that the unit does not replace the Epitest
method of complete system checking.
Reference to the use of the pulse duration tester is made in the Performance Masters AV Program - "Performance Part 2".
It is also demonstrated as a diagnostic tool in Jaguar Cars Inc. technical training courses.
The following chart, from the AV program material, indicates approximate pulse times for various engine conditions.
XJ6/XJ-S EFI PULSE DURATION
ENGINE
MODE
PULSE DURATION
CONDITION
(APPROXIMATE)
COLD 60~F
CRANKING
6.4 milliseconds
WARM-UP
ENGINE STARTS
4.5 milliseconds
AFTER 1 MINUTE
(approximate)
3.8 milliseconds
NORMAL
IDLE (no load)
2.5-2.7 milliseconds
(depending on CO @ IDLE)
3.0-3.1 milliseconds
IDLE ("D" selected)
(depending on CO @ IDLE)
STALL
8.8 milliseconds
(after 3 sec. initial surge)
The tester can be obtained direct from:-
Kent Moore Tool Division 29784 Little Mack Rosevide, Michigan 48066-2298
(313) 774-9500
