Suzuki Samurai 1986 Service Manual page 47

Condition
High fuel consumption Abnormal condition ignition system
Excessive engine oil
consumption
2-8
Possible cause
1. Improper ignition timing
2. Leak or loose connection of high tension cord
3. Defective spark plug (improper gap, heavy
deposits, and burned electrodes, etc..)
4. Cracked distributor cap or rotor
5. Malfunctioning mechanical and vacuum
advancers in distributor
Abnormal condition in fuel system
1. Improper float level
2. Fuel leakage from tank, pipe or carburetor
3. Malfunctioning carburetor choke system
4. Dirty or clogged carburetor jets
5. Clogged air cleaner element
6. Malfunctioning thermostatically controlled
air cleaner
Abnormal condition in engine
2. Poor valve seating
3. Improper valve clearance
Emission control
1. Air leaks at exhaust manifold
2. Oxygen sensor out of order
3. Water temperature switch out of order
4. Malfunctioning throttle position switch
5. Malfunctioning MCS (mixture control
solenoid) valve in carburetor
6. Malfunctioning EGR valve
Others
1. Dragging brakes
2. Slipping clutch
3. Improper tire pressure
Oil leakage
1. Loose oil drain plug
2. Loose oil pan securing bolts
3. Deteriorated or broken oil pan sealant
4. Leaky oil seals
5. Blown cylinder head gasket
6. Improper tightening of oil filter
7. Loose oil pressure switch
Correction
Adjust
Repair or replace
Clean, adjust or replace
Replace
Check and repair or
replace
Adjust
Repair or replace
Repair or replace
Clean
Clean or replace
Check and repair or
replace
Previously outlined
Repair or replace
Adjust
Tighten manifold bolts
and nuts.
Replace gasket.
Replace.
Replace.
Replace
Replace
Replace
Repair or replace
Adjust or replace
Adjust
Tighten
Tighten
Replace sealant
Replace
Replace
Tighten
Tighten