Subaru Legacy 2002 Service Manual page 385

Mechanical
TROUBLE
3) Initial combustion occur.
4) Engine stalls after initial
combustion.
ENGINE TROUBLE IN GENERAL
PROBLEM PARTS, ETC.
¼ Engine control system <Ref. to EN-2, Basic Diagnostic Procedure.> or <Ref. to
EN(w/oOBD)-2, Basic Diagnostic Procedure.>
¼ Intake system
¼ Fuel line
¼ Belt
¼ Compression
¼ Engine control system <Ref. to EN-2, Basic Diagnostic Procedure.> or <Ref. to
EN(w/oOBD)-2, Basic Diagnostic Procedure.>
¼ Intake system
¼ Fuel line
¼ Belt
¼ Compression
ME-96
POSSIBLE CAUSE
¼ Defective intake manifold gasket
¼ Defective throttle body gasket
¼ Defective fuel pump and relay
¼ Clogged fuel line
¼ Lack of or insufficient fuel
¼ Defective
¼ Defective timing
¼ Incorrect valve clearance
¼ Loosened spark plugs or defective gasket
¼ Loosened cylinder head bolts or defective gasket
¼ Improper valve seating
¼ Defective valve stem
¼ Worn or broken valve spring
¼ Worn or stuck piston rings, cylinder and piston
¼ Incorrect valve timing
¼ Improper engine oil (low viscosity)
¼ Loosened or cracked intake duct
¼ Loosened or cracked PCV hose
¼ Loosened or cracked vacuum hose
¼ Defective intake manifold gasket
¼ Defective throttle body gasket
¼ Dirty air cleaner element
¼ Clogged fuel line
¼ Lack of or insufficient fuel
¼ Defective
¼ Defective timing
¼ Incorrect valve clearance
¼ Loosened spark plugs or defective gasket
¼ Loosened cylinder head bolts or defective gasket
¼ Improper valve seating
¼ Defective valve stem
¼ Worn or broken valve spring
¼ Worn or stuck piston rings, cylinder and piston
¼ Incorrect valve timing
¼ Improper engine oil (low viscosity)
RANK
A
B
B
C
C
B
B
B
C
C
C
C
C
B
C
B
B
A
B
C
C
B
B
C
C
B
B
B
C
C
C
C
C
B
C
B
B