PDF Service Manual 1984-1986 Jeep CJ-7 Scrambler - 2 MB
This comprehensive service manual covers the 1984, 1985, and 1986 Jeep CJ-7 and Scrambler models.
It's the ultimate guide for DIY mechanics and professional technicians alike.
The manual contains detailed instructions for every aspect of repair and maintenance, from engine overhauls to electrical troubleshooting.
Keep your classic Jeep on the road and running strong with this essential information.
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--- Page 4 ---
Tool Ref. Required Recommended
J-22248 Cover Alignment and •
Tool
SEE
1.5. J-21882 Oil Pump Inlet Tube Installation Tool II1II
N
0 Valve Spring Removal and Installation II
T Tool
E
s
II1II
•
Case Cover Oil Seal Removal II
Tool
Air Hose Adapter II1II
884 Hydraulic Valve Tappet Removal and II
Installation Tool
Dial Indicator II
791 Vibration Removal Tool II
II1II
J-91 J-22248) II
J-5601 Ring Compressor II
Belt Tension Gauge II1II
Belt Tension Gauge II1II
Belt Tension II
Cooling System Tester II1II
Adapter
J-9789-C Universal Carburetor Kit II1II
J-10174-01 Main Jet Removal and Installation Tool II1II
Hand Vacuum Pump
ET-501-82 Fuel Feedback Tester II
ET-501 Fuel Feedback System Tester Adapter II
Tach/Dwell Meter II1II
--- Page 5 ---
ENGINES
GENERAL SERVICE AND DIAGNOSIS
Service Diagnosis - Performance (Continued)
Condition Possible Cause Correction
FAULTY H1GH ( I n) Inl;l�l' m:lnifokl rc�trictt:'u. (In) Remove rcstriction or replacc manifold.
SPEED
OPERATiON (17) \\\)1"11 dl"lrihutnr �hart. ( 17) RcpliKC shaft.
(Continued)
( 1 X) llllprl \j1l'l kcJhack �y�lcm opcration. (I�) Refcr to fccdback System Diagnosis. SEE
1,5.
MISFIRE AT ALL ( I) Faulty �purk plug(s). ( 1 ) Clcan or replacc spark plug.(s). N
o
SPEEDS
T
(2) Faulty spark plug wirers). (2) Replace as nCL"cssary.
E
S
(j) Faulty distrihutor cap nr rotor. (j) Rcpli..lcc cap or rotor.
I
(4) Faulty ignition coil. (4) Test c oil and replace as necessary.
(5) Primary ignition circuit shorted l)f open (5) Troubleshoot primary circuit and repair as
intermittently. necessary.
(6) I mprope rly seated valve(s). (6) Test <.:ylindcr compression. repair as
necessary.
I
(7) Faulty hydraulic tappet(s). (7) Clean or replace lappet(s).
(8) Improper feedback sy stem operation. (8) Refer to Feedback System Diagnosis.
(9) Faulty valve springes). (9) Inspect and test valve spring tension. repair
as necessary.
(10) Worn c ams h a ft lobes. ( 10) Re p l ace c a ms h a ft .
I (II) Air leak into manifold. (II) Check manifold vacuum and repair as
necessary .
(12) Imprope r quburetor adjustment. (12) Adju s t carburetor.
( 13) Fuel pump volume or pressure low. (13) Repl ac e fuel pump.
(14) Blown cylinder head gas ket. ( 14) Re plac e gasket.
(15) Intake or exhaust manifold passage(s) (15) Pass chain th rou g h passage(s) and repair as
restricted. necessary.
(16) Incorrect trigger wheel installed in (16) Install correct trigger wheel.
distributor.
POWER NOT UP (1) Incorrect ignition timing. (1) Adjust timing.
TO NORMAL
(2) Faulty distributor ro�or. (2) Replace r otor .
(3) Trigger wheel loose on shaft. (3) Reposition or replace trigger wheel.
(4) Incorrect spark plug gap. (4) Adjust gap.
(5) Faulty fuel pump. (5) Replace fuel pump.
80652D
8-15
--- Page 6 ---
4
1 2 2 5
840115
--- Page 7 ---
vacuum source vacuum
SEE
actuator. LS.
N
0
If turn ON. T
E
S
not
e vacuum hose
connector.
connector.
nect , vacuum
actuator.
a
actuator. or