Fuel Economy Tests; Fuel Pump Replacement; Fuel Pump Specification Chart - Jeep J-10 Series 1982 Technical & Service Manual

(3) Operate engine at 1500 rpm for 30 seconds. Vac
uum should not exceed 3 in. Hg (10 kPa).
(4) If vacuum exceeds 3 inches of mercury, check
fuel line for restriction. A partially clogged in-tank fuel
filter can also cause excess vacuum.
NOTE: Gauge will not indicate a vacuum until fuel in
carburetor float bowl has been consumed and pump
begins to operate at full capacity.
Fuel Pump Specification Chart
Engine
Volume
(30 seconds)
Pressure
PSI
(kPa)
Vacuum in. Hg(kPa)
Direct
Indirect
Four-
Cylinder
1 pint
(0.47 liters)
6.5 to 8
(44 to 55)
10
(33.77kPa)
3
(10.13kPa)
Six-
Cylinder
1 pint
(0.47 liters)
4 to 5
(28.58 to
34.47)
10
(33.77kPa)
3
(10.13kPa)
Eight-
Cylinder
1 pint
(0.47 liters)
5 to 6.5
(34 to 45)
10
(33.77kPa)
3
(10.13kPa)
80262B
Fuel Pump Replacement
Rimovil
(1) Disconnect fuel pipe fittings from fuel pump.
(2) Remove retaining screws.
(3) Remove pump and gasket.
FUEL SYSTEMS 1J-11
Instillation
(1) Install pump and replacement gasket.
NOTE: Ensure actuating lever is positioned properly
on camshaft eccentric.
(2) Install retaining screws.
(3) Connect fuel pipe fittings to fuel pump.
FUEL ECONOMY TESTS
When testing fuel economy for six- and eight-cylinder
engines, connect the testing device between the fuel
filter and the carburetor. Do not block off the fuel
return line because this may cause an erronious miles-
per-gallon indication.
SPECIFICATIONS
Fuel Tank Capacity
Vehicle Gallons
CJ
14.8 (56.0 liters)
Optional: 20 (75.6 liters)
Cherokee
Wagoneer
21.5 (81.4 liters)
Truck 18.2 (68.9 liters)
80708
CARBURETOR MODEL 2SE -
2 VENTURI
Carburetor Circuits
Carburetor Overhaul
Carburetor Replacement
Choice Mechanism Service
Page
U-13
U-16
U-16
U-29
GENERAL
The model 2SE carburetor is a two venturi, two stage,
down draft type carburetor (figs. 1J-17 and 1J-18). To
reduce weight, aluminum castings are used for the air
horn, float bowl and throttle body. A heat insulator
gasket is located between the throttle body and float
bowl to reduce heat transfer to the float bowl.
The primary stage has a triple venturi with a small
35 mm bore that provides efficient fuel metering control
during idle and partial throttle operation.
The secondary stage has a larger 46 mm bore that
provides the additional air supply necessary for higher
engine power requirements. An air valve with a single
tapered metering rod is used in the secondary stage.
An integral one-inch pleated-paper fuel filter with
check valve is located between the front of the float bowl
and the fuel inlet fitting. The check valve prevents fuel
flow to the carburetor in the event of vehicle rollover.
SECONDARY
AIR VALVE
General
Seaiad Idle Mixture Screw
Service Adjustment Procedures
Specifications
Page
U-11
U-16
U-25
U-30
CHOKE
VALVE VACUUM
BREAK
4&PPE
IDLE SPEED
SLOW IDLE / FAST SOLENOID
SPEED FAST IDLE SPEED lP.L.f
ADJUSTMENT ADJUSTMENT
SCREW SCREW
CAM
90646
Fig. U-17 Model 2SE Carburetor