AW 150 Ramcharger V8-318 5.2L (1984)
Accelerator Pump: All Technical Service Bulletins
Engine - Sag On Light Acceleration
Models
1984 318-2BBL Light Duty Trucks With Holley Model 2280 Carburetor Built Before December 21, 1983 (Date Code 3553 or Before)
Subject
Engine Sag on Light Acceleration
Index
FUEL
Date
August 6, 1984
No..
14-38-84
P-3329-C
SYMPTOM/CONDITION
A condition may exist on subject model vehicles with a carburetor build date prior to December 21, 1983 (a Julian date code will be metal stamped on
the left side of the fuel bowl casting, i.e., 3553 = 355 day of 1983) of engine sag (hesitation) on light acceleration, which is especially noticeable when
turning.
Vehicle will accelerate normally during heavy acceleration type driving.
This condition may be caused by a slight bind in the accelerator pump system, which does not allow a complete pump fuel shot during light
accelerations. This condition can be verified by looking in the carburetor air horn and observing the accelerator pump fuel discharge while slowly
opening the throttle. If two strong streams of fuel are observed the accelerator pump linkage is OK. If discharge is intermittent or very weak proceed with
this service.
REPAIR PROCEDURE
1.
Remove air cleaner assembly. Remove accelerator pump linkage cover plate.
FIGURE 1
2.
Note direction of the "U" link holding the accelerator pump shaft to actuator lever. This "U" link will be reversed during reassembly (Figure 1).
