Misfire At All Speeds; Power Not Up To Normal - Jeep CJ-7 1984 Workshop Manual

Condition
( I n) Inl;l�l' m:lnifokl rc�trictt:'u.
FAULTY H1GH
SPEED
(17) \\\)1"11 dl"lrihutnr �hart.
OPERATiON
(Continued)
( 1 X) llllprl \j1l'l kcJhack �y�lcm opcration.
( I) Faulty �purk plug(s).
MISFIRE AT ALL
SPEEDS
(2) Faulty spark plug wirers).
(j)
(4)
(5)
(6)
(7) Faulty
I
(8)
(9)
(10) Worn
(II)
(12)
( 13)
(14) Blown
(15) Intake
(16) Incorrect
(1)
POWER NOT UP
TO
NORMAL
(2)
(3)
(4) Incorrect spark plug gap.
(5)
ENGINES
GENERAL SERVICE AND DIAGNOSIS
Diagnosis Performance (Continued)
Service
-
Possible Cause
Faulty distrihutor cap
rotor.
nr
Faulty ignition coil.
Primary ignition circuit shorted
intermittently.
I mpr pe rly seated valve(s).
o
tappet(s).
hydraulic
feedback
Improper sy te operation.
s m
Faulty valve springes).
am h ft lobes.
s
c a
Air leak manifold.
into
adjustment.
Imp ope quburetor
r r
Fuel pump volume or pressure low.
s
cylinder head g ket.
a
or exhaust manifold
restricted.
trigger wheel installed in
distributor.
Incorrect ignition timing.
Faulty distributor ro�or.
shaft.
wheel
Trigger loose on
Faulty fuel pump.
(In) Remove rcstriction
( 17) RcpliKC shaft.
(I�) Refcr to fccdback System
( 1 ) Clcan
replacc spark plug.(s).
or
(2) Replace
as
(j) Rcpli..l c c cap or rotor.
(4) Test oil and replace
c
open (5)
Troubleshoot primary
l)f
necessary.
(6) Test
<.:ylindcr compression. repair as
necessary.
(7) Clean or replace
(8) Refer to Feedback System
(9)
Inspect and test
necessary.
as
p a a
ce
( 10) Re l c
(II) Check manifold vacuum and repair as
necessary .
(12) d t carburetor.
A j s
u
e fuel pump.
(13)
Repl a
c
c
( 14) R e gasket.
pla
e
passage(s) (15) Pass chain
necessary.
(16)
Install correct trigger
(1)
Adjust timing.
(2) R l e o
a
ep c
r
(3) Reposition or replace trigger wheel.
gap.
(4) Adjust
(5) fuel pump.
Replace
8-15
Correction
replacc manifold.
or
Diagnosis.
nCL"cssary.
necessary.
as
circuit and repair
lappet(s).
Diagnosis.
valve
spring tension. repair
h a ft .
ms
th h
passage(s) and repair
o g
r u
wheel.
to
r
.
80652D
SEE
1,5.
N
o
T
E
S
as
as