ME(H4SO)-90
MECHANICAL
Engine Trouble in General
3) Initial combustion occurs. Engine control system <Ref. to EN(H4SO)(diag)-2, Basic Diagnostic Procedure.> or
<Ref. to EN(H4SOw/oOBD)(diag)-2, Basic Diagnostic Procedure.>
A
Intake system Defective intake manifold gasket B
Defective throttle body gasket B
Fuel line Defective fuel pump and relay C
Clogged fuel line C
Lack of or insufficient fuel B
Belt Defective B
Defective timing B
Compression Incorrect valve clearance C
Loosened spark plugs or defective gasket C
Loosened cylinder head bolts or defective gasket C
Improper valve seating C
Defective valve stem C
Worn or broken valve spring B
Worn or stuck piston rings, cylinder and piston C
Incorrect valve timing B
Improper engine oil (low viscosity) B
4) Engine stalls after initial
combustion.
Engine control system <Ref. to EN(H4SO)(diag)-2, Basic Diagnostic Procedure.> or
<Ref. to EN(H4SOw/oOBD)(diag)-2, Basic Diagnostic Procedure.>
A
Intake system Loosened or cracked intake duct B
Loosened or cracked PCV hose C
Loosened or cracked vacuum hose C
Defective intake manifold gasket B
Defective throttle body gasket B
Dirty air cleaner element C
Fuel line Clogged fuel line C
Lack of or insufficient fuel B
Belt Defective B
Defective timing B
Compression Incorrect valve clearance C
Loosened spark plugs or defective gasket C
Loosened cylinder head bolts or defective gasket C
Improper valve seating C
Defective valve stem C
Worn or broken valve spring B
Worn or stuck piston rings, cylinder and piston C
Incorrect valve timing B
Improper engine oil (low viscosity) B
TROUBLE PROBLEM PARTS, ETC. POSSIBLE CAUSE RANK
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