Subaru IMPREZA GD 2007 Series Manual page 2496

asieps_tobira_IM_US.book 95 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Symptoms
3) Initial combustion occurs.
4) Engine stalls after initial
combustion.
Engine Trouble in General
Problem parts etc.
Engine control system <Ref. to EN(H4DOTC)(diag)-2, Basic Diagnostic Procedure.>
<Ref. to EN(STI)(diag)-2, Basic Diagnostic Procedure.>
Intake system Defective intake manifold gasket
Defective throttle body gasket
Fuel line Defective fuel pump and relay
Clogged fuel line
Lack of or insufficient fuel
Timing belt Degradation, etc.
Defective timing
Compression Incorrect valve clearance
Loosened spark plug or defective gasket
Loosened cylinder head bolt or defective head gasket
Improper valve sealing
Defective valve stem
Worn or broken valve spring
Worn or stuck piston rings, cylinder and piston
Incorrect valve timing
Improper engine oil (low viscosity)
Engine control system <Ref. to EN(H4DOTC)(diag)-2, Basic Diagnostic Procedure.>
<Ref. to EN(STI)(diag)-2, Basic Diagnostic Procedure.>
Intake system 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
Fuel line Clogged fuel line
Lack of or insufficient fuel
Timing belt Degradation, etc.
Defective timing
Compression Incorrect valve clearance
Loosened spark plug or defective gasket
Loosened cylinder head bolt or defective head gasket
Improper valve sealing
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(H4DOTC)-95
MECHANICAL
Possible cause 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