Starter Defective battery-to-starter harness
Defective starter switch
Defective inhibitor switch or neutral switch
B
C
C
Run-down battery
Defective charging system
Seizure
of
crankshaft and connecting rod bearing
Seized camshaft
A
B
C
C
Loosened cylinder head bolts or defective gasket
Improper valve seating
Defective valve stem
C
C
C
I
Improper engine oil (low viscosity)
Engine control system <Ref. to EN(D0HC TURBO)-2, Basic Diagnostic Procedure.>
Intake system Defective intake manifold gasket
Defective throttle bodv aasket
B
A
B
B
Compression
“
Incorrect valve clearance C
Loosened spark plugs or defective gasket C
Loosened cylinder head bolts or defective gasket C
Defective valve stem
Worn or broken valve spring
Worn
or
stuck piston rinas. cvlinder and piston
C
B
C
ENGINE TROUBLE IN GENERAL
MECHANICAL
21
.Engine Trouble in General
A:
INSPECTION
NOTE:
A
-
Very often
“RANK’ shown in the chart refers to the possibility
of
reason for the trouble in order (“Very often” to
“Rarely”)
B
-
Sometimes
C
-
Rarely
PROBLEM PARTS, ETC.
I
POSSIBLE CAUSE
I
RANK
TROUBLE
1.
Engine will not start.
1)
Starter does not turn.
1
Defective starter IB
I
Poor terminal connection
IA
Battery
Friction
I
Seized or stuck piston and cylinder
IC
~~
2) Initial combustion does
not occur.
Starter
1
Defective starter IC
Engine control system <Ref.
to
EN(D0HC TURBO)-2, Basic Diagnostic Procedure.>
1
A
Fuel line Defective fuel pump and relay
Lack of or insufficient fuel
IA
IB
I
I
Belt
I
Defective IB
I
Defective timina IB
Compression
I
Incorrect valve clearance
IC
1
Loosened spark plugs or defective gasket
IC
FWornG broken valve sprina IB
I
Worn or stuck piston rings, cylinder and piston
IC
I
Incorrect valve timing
IB
3)
Initial combustion occur.
~~
Fuel line
I
Defective fuel pump and relay
IC
1
Clogged fuel line
IC
I
Lack of or insufficient fuel
IB
Belt
Defective IB
Defective timina IB
I
Improper valve seating
IC
I.lncorrect vaG timina IB
I
Improper engine oil (low viscosity)
IB
ME(D0HC TURBO)-91
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