Subaru Legacy 2002 Service Manual page 1102

TROUBLE
10. Excessive fuel con-
sumption
ENGINE TROUBLE IN GENERAL
PROBLEM PARTS, ETC.
¼ Engine control system <Ref. to EN(H6)-2, Basic Diagnostic Procedure.>
¼ Intake system
¼ Chain
¼ Compression
¼ Lubrication system
¼ Cooling system
¼ Others
ME(H6)-81
POSSIBLE CAUSE
¼ Dirty air cleaner element
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 Incorrect oil pressure
¼ Over cooling
¼ Accelerator cable out of adjustment
Mechanical
RANK
A
A
B
B
C
C
B
C
C
B
B
C
C
B