Hard Starting - Jeep J-10 Series 1982 Technical & Service Manual

GENERAL SERVICE AND DIAGNOSIS 1A-7
Service Diagnosis—Mechanical (Continued)
Condition
Possible Cause
Correction
VALVE TRAIN NOISE
(10) Loose rocker arms.
(10) Tighten bolts to specified torque.
(Continued)
(11) Valve seat runout excessive.
(11) Regrind valve seat/valves.
(12) Missing valve lock.
(12) Install valve lock.
(13) Push rod rubbing or contacting
(13) Remove cylinder head and
cylinder head. remove obstruction in head.
(14) Excessive oil level (4-cyl.). (14) Correct oil level.
Service Diagnosis—Performance
Condition Possible Cause
Correction
HARD STARTING
til
Binding linkage, choke valve or
1
Repair as necessary.
(STARTER MOTOR choke piston.
OPERATES
NORMALLY)
(2)
Restricted choke vacuum and
hot air passages.
2 • •
(Mean passages.
(3)
Improper fuel level.
•3>
Adjust float level.
<4)
Dirty, worn or faulty need le
va lve and scat.
4
Repair as necessary.
i5i
Float sticking.
5
Repair as net es- ir\.
(6) Exhaust manifold heat valve stuck
(eight-cylinder engine only).
(6)
Lubricate or replace.
(7)
Faulty fuel pump. 7i
Replace fuel pump.
(8)
Incorrect choke cover adjustment.
S»
Adjust choke rover.
i.9)
Inadequate unloader adjustment.
9.
Adjust unloader.
(10)
Faulty ignition coil.
10.
Test and replace as ;ieves>aiy.
ill)
Improper spark plug gap.
11 i
Adjust gap.
i-12i
Incorrect initial timing.
12i
Adjust timing.
il3>
Incorrect valve timing.
131
Check valve timing: repair as.
necessary.
ROUGH IDLE OR
tl)
Incorrect curb or fast idle speed.
'li
Adjust curb or fast idle speed.
STALLING
t2)
Incorrect initial timing.
2;
Adjust timing to speniications.
<3)
Improper idle mixture adjustment.
<3)
Adjust idle mixture.
(4)
Damaged tip on idle mixture
screw(s).
*4)
Replace mixture screw(s).
(5)
Improper fast idle cam adjustment
(5)
Adjust fast idle speed.
(6)
Faulty EGR valve operation.
6)
Test EGR system and repl.i. <• as
necessary.
(7) Faulty PCV valve air flow.
• 7)
Test PCV valve and replace as
necessary.