F 350 2WD Pickup V8-6.9L DSL (1983)
Injection Timing: Technical Service Bulletins
Diesel Engine - Dynamic Timing Specifications
Article No. 83-24-23
DIESEL (6.9L) - DYNAMIC TIMING SPECIFICATIONS
LIGHT TRUCKS 1983 E & F-SERIES
CALIBRATIONS: 4-68J-R00, 4-68X-R00
FIGURE 34
New Exhaust Emission Calibrations 4-68J-R00 and 4-68X-R00 have been released as 1984 Running Changes. The new calibrations require different
dynamic timing specifications as shown in Figure 34. Early 1984 production trucks have 3-68J-R10 and 3-68X-R10 calibrations which require 1984
dynamic timing specifications. Prior to adjusting timing on 1984 trucks, the Technician must determine the emission calibration number (which is printed
on the engine code label located on the injection pump adapter (housing)) and set dynamic injection timing as specified in Figure 34.
NOTE:
The following procedures should be followed when checking or setting dynamic injection timing on the 6.9L diesel engine.
1.
The engine must be stabilized at normal operating temperature (192~F-212~F). This temperature is needed to insure proper fuel ignition in the
precombustion chambers.
2.
Prior to checking the dynamic timing with the Rotunda 78-0100 Dynamic Timing Meter, perform the meter operation check as identified in
instruction manual included with the meter.
3.
The Dynamic Timing Specifications Chart takes cetane value as well as altitude into consideration. For this reason, the chart, as well as the cetane
tester, must be used when evaluating the timing of a 6.9L diesel.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"
