Subaru 2002 IMPREZA Service Manual page 292

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