Jeep J-10 Series 1982 Technical & Service Manual page 352

U-40 FUEL SYSTEMS
LOCATOR
POINT
RECESSED IDLE MIXTURE
SCREW AND PLUG
LOCATION
90710
Fig. 1J-83 Carburetor Model E2SE—
Idle Mixture Screw Plug Removal
NOTE: The hardened plug will break rather than re
main intact. It is not necessary to remove the plug
completely; instead, remove loose pieces to allow use of
Idle Mixture Adjusting Tool J-29030, or equivalent.
(c) Using Tool J-29030, or equivalent, remove
idle mixture screw and spring from throttle body (fig.
1J-84).
**v&k Y*
IDLE SCREW
REMOVING TOOL
90711
Fig. 1J-84 Carburetor Model E2SE—Idle Mixture Screw Removal
Cleaning and Inspection
CAUTION: The idle speed solenoid, mixture control
solenoid, electrically heated choke assembly, rubberand
plastic components, diaphragms, pump plunger and
plasticfiller block must NOT be immersed in carburetor
cleaning solution because they will either harden, swell
or distort.
The carburetor components should be cleaned in a
cold immersion-type carburetor cleaning solution.
The plastic bushings located on the end of the vacuum
break rod and air valve rod may be cleaned in carburetor
cleaning solution.
(1) Thoroughly clean all metal parts and blow dry
with compressed air. Ensure all fuel passages and
metering parts are free of burrs and dirt. Do not pass
drill bits or wires through jets and passages.
(2) Inspect upper and lower surface of carburetor
castings for damage.
(3) Inspect holes in levers for excessive wear or out
of round conditions. If worn, levers should be replaced.
Inspect plastic bushings on levers for damage and exces
sive wear. Replace as required.
(4) Inspect, repair, or replace indicated parts if fol
lowing problems have been encountered.
(a) Flooding:
1. Inspect float valve and seat for dirt, deep
wear grooves, scores and proper seating.
2. Inspect float valve pull clip for proper
installation (fig. 1J-85). Do not bend pull clip.
3. Inspect fioat, float arms and hinge pin
for distortion, binds and burrs. Determine density of
material in float; if heavier than normal, replace float.
4. Clean or replace fuel inlet filter-check
valve assembly.
(b) Hesitation:
1. Inspect pump plunger for cracks, scores
or excessively worn cup. A previously used pump cup
will shrink when dry. If dried out, soak in fuel for eight
hours before testing.
2. Inspect pump duration and return
springs for weakness or distortion.
3. Examine all pump passages and jet for
debris, improper seating of discharge check ball and
scores in pump well. Examine condition of pump dis
charge check ball spring.
4. Inspect pump linkage for excessive wear;
repair or replace as necessary.
(c) Hard Starting—Poor Cold Engine Opera
tion:
1. Examine choke valve and linkage for ex
cessive wear, binding or distortion.
2. Inspect choke vacuum diaphragm(s) for
leaks.
3. Clean or replace carburetor fuel filter.
4. Inspect float valve for sticking condition,
debris, etc.