Suzuki GRAND VITARA Owner's Manual page 107

Condition
Excessive engine oil
consumption – Oil
leakage
Excessive engine oil
consumption – Oil
entering combustion
chamber
Engine hesitates –
Momentary lack of
response as accelerator
is depressed. Can occur
at all vehicle speeds.
Usually most severe when
first trying to make
vehicle move, as from a
stop sign
Possible cause
Blown cylinder head gasket
Leaky camshaft oil seals
Sticky piston ring
Worn piston and cylinder
Worn piston ring groove and ring
Improper location of piston ring gap
Worn or damaged valve stem seal
Worn valve stem
Spark plug faulty or plug gap out of
adjustment
Leaky high-tension cord (for M16
engine)
Fuel pressure out of specification
Malfunctioning EGR valve
Poor performance of ECT sensor or
MAF sensor
Faulty electric throttle body assembly
Faulty accelerator pedal position (APP)
sensor assembly
Faulty fuel injector
Faulty ECM
Engine overheating
Low compression
Camshaft position control (VVT) system
out of order (for M16 engine)
Engine General Information and Diagnosis:
Correction / Reference Item
"Cylinder Head Inspection: For J20 Engine in
Section 1D" or "Cylinder Head Inspection: For
M16A Engine with VVT in Section 1D"
"Camshaft, Tappet and Shim Inspection: For
J20 Engine in Section 1D" or "Camshaft,
Tappet and Shim Inspection: For M16A Engine
with VVT in Section 1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning: For J20
Engine in Section 1D" or "Cylinders, Pistons
and Piston Rings Inspection: For M16A Engine
with VVT in Section 1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning: For J20
Engine in Section 1D" or "Cylinders, Pistons
and Piston Rings Inspection: For M16A Engine
with VVT in Section 1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning: For J20
Engine in Section 1D" or "Cylinders, Pistons
and Piston Rings Inspection: For M16A Engine
with VVT in Section 1D"
"Pistons, Piston Rings, Connecting Rods and
Cylinders Disassembly and Assembly: For J20
Engine in Section 1D" or "Pistons, Piston
Rings, Connecting Rods and Cylinders
Disassembly and Assembly: For M16A Engine
with VVT in Section 1D"
"Valves and Valve Guides Inspection: For J20
Engine in Section 1D" or "Valves and Valve
Guides Inspection: For M16A Engine with VVT
in Section 1D"
"Valves and Valve Guides Inspection: For J20
Engine in Section 1D" or "Valves and Valve
Guides Inspection: For M16A Engine with VVT
in Section 1D"
"Spark Plug Inspection: in Section 1H"
"High-Tension Cord Inspection (For M16
Engine): in Section 1H"
"Fuel Pressure Check: "
"EGR Valve Inspection: in Section 1B"
"Engine Coolant Temperature (ECT) Sensor
Inspection: in Section 1C" or "Mass Air Flow
(MAF) and Intake Air Temperature (IAT)
Sensor Inspection: in Section 1C"
"Electric Throttle Body Assembly On-Vehicle
Inspection: in Section 1C"
"Accelerator Pedal Position (APP) Sensor
Assembly Inspection: in Section 1C"
"Fuel Injector Circuit Check: "
Condition "Engine overheating"
"Compression Check: For J20 Engine in
Section 1D" or "Compression Check: For
M16A Engine with VVT in Section 1D"
"Oil Control Valve Inspection: For M16A
Engine with VVT in Section 1D"
1A-52