ENGINE TROUBLE IN GENERAL
MECHANICAL
7.
After burning in exhaust
system
TROUBLE
I
PROBLEM PARTS, ETC.
I
POSSIBLE CAUSE
I
RANK
5.
Enaine does not return
to
I
Enaine control svstem <Ref. to EN(D0HC TURBOb2. Basic Diaanostic Procedure.>
I
A
1
Engine control system <Ref.
to
EN(D0HC TURBO)-2, Basic Diagnostic Procedure.>
Intake system
A
C
I
Loosened or cracked intake duct
I
idle.
Loosened oil filler cap
Defective timing
Incorrect valve clearance
*
,I
*
I
Intake system
I
Loosened or cracked vacuum hose
IA
C
B
B
I
I
Others
1
Stuck or damaaed throttle valve \A1
Worn or broken valve spring
Worn or stuck piston rings, cylinder and piston
Incorrect valve timing
I
I
I
I
I
-
C
C
A
I
Accelerator cable out of adjustment
IB
A
6.
Dieseling (Run-on)
I
Engine control system <Ref. to EN(D0HC TURBO)-2, Basic Diagnostic Procedure.>
I
8.
Knocking
I
1
I
~~
Others
Engine control system <Ref.
to
EN(D0HC TURBO)-2, Basic Diagnostic Procedure.>
I
Malfunction of evaporative emission control system C
A
Intake system
I
Loosened oil filler cap B
I
I
Cooling system
I
Overheating IBI
Overheating
Loosened or cracked PCV hose
Defective PCV valve
I
Others
I
Malfunction of evaoorative emission control svstem
I
B1
A
A
B
Loosened oil pump attaching bolts and defective
gasket
Defective oil filter o-rina
I
I I
Loosened or cracked PCV hose IC1
B
B
I
I
I
I
I
I
I I
Loosened or cracked vacuum hose
I
I
I
I
I
Defective PCV valve
I
I
I
Loosened spark pluns or defective nasket IC1
I
I
I
.-
-
I
I
I
I
I
Loosened cylinder head bolts or defective gasket
I
C
I
I
I
I
I
I
I
I
Improper valve seating IBI
I
I
I
4
I
I I
Defective valve stem IC1
I
I
Lubrication system
I
Incorrect oil pressure IC1
I
I
I
I
I
Cooling system
I
Over cooling IC1
I
I
Belt
I
Defective timina IBI
I
I
I
I
I
-
9.
Excessive engine oil con-
sumption
Compression
Cooling system
Intake system
Compression
Lubrication system
Incorrect valve clearance IC
Incorrect valve timing IB
IC
Loosened oil filler cap
Defective valve stem IA
Worn or stuck piston rings, cylinder and piston
IA
Defective crankshaft oil seal
IB
Defective rocker cover gasket
IB
Loosened oil drain plug or defective gasket
IB
Loosened oil pan fitting bolts or defective oil pan
IB
ME(D0HC TURBO)-94
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