F 250 2WD Pickup V8-6.9L DSL (1985)
Throttle Cable/Linkage: All Technical Service Bulletins
Diesel Engine - Supplemental Diagnostic Tips
Article No.
PERFORMANCE POOR - 6.9L DIESEL - SUPPLEMENTAL SERVICE DIAGNOSTIC TIPS
87-10-21
FORD - LIGHT TRUCK: 1987 E SERIES, F SERIES
ISSUE:
Supplemental Service Diagnostic Tips have been developed to make sure of accurate diagnosis of poor performance concerns on the 6.9L
diesel engine.
ACTION:
To diagnose the cause of poor 6.9L engine performance, use the following supplemental service procedures.
The information in this article is to be used with the 1987 Engine/Emission Diagnosis Shop Manual, Volume H, and with Engine Performance Chart
(Form FPS-8433-C) 6.9L (420 CID) Diesel Engine Diagnostic Guide. Steps 1 through 6 of Form FPS- 8433-C are to be completed and recorded before
starting this procedure. (This includes correction of any concerns found in the first six steps.)
Figure 19 - Article 87-10-21
1.
Check accelerator linkage, Figure 19. Throttle lever MUST contact full throttle stop when accelerator pedal is fully depressed. If the full throttle
stop is not reached, or if the accelerator pedal interferes with floor carpet/mat as the pedal is moved towards wide open throttle, install the new
(E7TZ-9725-A) pedal which will provide 3/8 inch additional pedal clearance. The engine cannot produce maximum power or RPM if full throttle
is not achieved. Record results in Step 8 of Form FPS-8433-C.
