|
STATE
|
Probable Cause
|
elimination
|
|||
|
Difficult start (at cold start of the engine)
|
Ignition system malfunction
|
The fuse has blown.
|
Replace fuse.
|
||
|
Burnt out spark plug.
|
Clean or replace spark plug.
|
||||
|
The setting of the ignition timing is violated.
|
Correct the ignition timing.
|
||||
|
Faulty ignition coil.
|
Replace ignition coil.
|
||||
|
Fuel system malfunction
|
The fuel supply from the fuel tank is blocked.
|
Apply fuel.
|
|||
|
Fuel filter dirty or clogged.
|
Replace fuel pump assembly.
|
||||
|
Fuel line blockage.
|
Clean fuel line.
|
||||
|
Fuel pump malfunction.
|
Replace fuel pump assembly.
|
||||
|
Fuel injector malfunction.
|
Replace nozzle.
|
||||
|
Foreign matter in the fuel tank.
|
Clean the fuel tank and replace the fuel pump assembly.
|
||||
|
compression pressure drop
|
Weak spark plug.
|
Tighten to the specified tightening torque.
|
|||
|
Cracked cylinder head gasket.
|
Replace gasket.
|
||||
|
Incorrect valve clearance.
|
Correct clearance.
|
||||
|
Valve stem failure.
|
Replace valve or valve guide.
|
||||
|
Insufficient elasticity or damage to the valve spring.
|
Replace valve spring.
|
||||
|
A significant violation in the operation of pistons and cylinders.
|
Replace piston ring.
|
||||
|
Severe wear of pistons, rings or cylinders.
|
Replace ring or piston with bore or replace cylinder.
|
||||
|
Other
|
Breakage of the drive belt of the gas distribution mechanism.
|
Replace belt.
|
|||
|
Faulty crankcase ventilation valve.
|
Check and, if necessary, replace the positive crankcase ventilation valve.
|
||||
|
Disconnection, damage or leakage of the vacuum hose.
|
Establish a secure hose connection or replace it.
|
||||
|
Leak in intake system.
|
Replace intake system.
|
||||
|
STATE
|
Probable Cause
|
elimination
|
|||
|
Lack of engine power
|
compression pressure drop
|
||||
|
Ignition system malfunction
|
The setting of the ignition timing is violated.
|
Correct the ignition timing.
|
|||
|
Burnt out spark plug.
|
Adjust or replace spark plug.
|
||||
|
Fuel system malfunction
|
Fuel line blockage.
|
Clear pipe.
|
|||
|
Clogged or dirty fuel filter.
|
Replace fuel pump assembly.
|
||||
|
Other
|
Clogged exhaust system.
|
Check and repair the system.
|
|||
|
Clogged or dirty air filter element.
|
Clean or replace air filter element.
|
||||
|
Leak through the intake manifold gasket.
|
Replace gasket.
|
||||
|
Weak brake performance.
|
Repair or replace brakes.
|
||||
|
Clutch slip.
|
Adjust or replace clutch.
|
||||
|
Unsteady idle.
|
compression pressure drop
|
||||
|
Fuel system malfunction
|
Fuel line blockage.
|
Clear pipe.
|
|||
|
Clogged or dirty fuel filter.
|
Replace fuel pump assembly.
|
||||
|
Ignition system malfunction
|
Faulty spark plug.
|
Adjust or replace spark plug.
|
|||
|
Inaccurate setting of the ignition timing.
|
Correct the ignition timing.
|
||||
|
Faulty ignition coil.
|
Replace ignition coil.
|
||||
|
Other
|
Clogged or dirty air filter element.
|
Clean or replace air filter element.
|
|||
|
Leak through the intake manifold gasket.
|
Replace gasket.
|
||||
|
Faulty crankcase ventilation valve.
|
Check or replace if necessary.
|
||||
|
Loose connection or damaged or leaking vacuum hose.
|
Establish a secure hose connection or replace it.
|
||||
|
STATE
|
Probable Cause
|
elimination
|
|||
|
"slowness" engine (The engine does not react immediately when the gas pedal is pressed. This is especially noticeable when using cruise control or starting).
|
compression pressure drop
|
||||
|
Ignition system malfunction
|
Inaccurate setting of the ignition timing.
|
Correct the ignition timing.
|
|||
|
Faulty spark plug or spark gap needs to be adjusted.
|
Replace spark plug.
|
||||
|
Other
|
Air purification system malfunction.
|
Clean or replace the air cleaning system.
|
|||
|
Leak through the intake manifold gasket.
|
Replace gasket.
|
||||
|
Rough running engine (engine power changes at a fixed speed and the speed changes without changing the pressure on the gas pedal).
|
compression pressure drop
|
||||
|
Fuel system malfunction
|
Fuel line blockage.
|
Clear pipe.
|
|||
|
Clogged or dirty fuel filter.
|
Replace fuel pump assembly.
|
||||
|
Ignition system malfunction
|
Faulty spark plug.
|
Adjust or replace spark plug.
|
|||
|
Inaccurate setting of the ignition timing.
|
Correct the ignition timing.
|
||||
|
Other
|
Leak through the intake manifold gasket.
|
Clean or replace gasket.
|
|||
|
Vacuum hose leak.
|
Establish a secure hose connection or replace it.
|
||||
|
Increased detonation (within the throttle opening, a metallic pop with a disturbed flash is heard).
|
Engine overheating
|
Cm. "Overheat" on this page.
|
Cm. "Overheat" on this page.
|
||
|
Ignition system malfunction
|
Faulty spark plug.
|
Replace spark plug.
|
|||
|
Inaccurate setting of the ignition timing.
|
Correct the ignition timing.
|
||||
|
Fuel system malfunction
|
Clogged or dirty fuel filter and fuel line.
|
Clean or replace fuel pump assembly and fuel line.
|
|||
|
Other
|
Leak through the intake manifold gasket.
|
Replace gasket.
|
|||
|
Large soot due to impaired combustion.
|
Remove soot.
|
||||
|
STATE
|
Probable Cause
|
elimination
|
|||
|
Overheat
|
Cooling system failure
|
Lack of coolant.
|
Add coolant.
|
||
|
Thermostat failure.
|
Replace thermostat.
|
||||
|
Malfunction of the cooling fan.
|
Check or replace the cooling fan.
|
||||
|
Coolant pump malfunction.
|
Replace pump.
|
||||
|
Radiator is clogged or leaking.
|
Clean, repair or replace the radiator.
|
||||
|
Lubrication system failure
|
Poor quality engine oil.
|
Change the engine oil to the specified grade.
|
|||
|
Clogged oil filter or coarse filter.
|
Clean or replace oil filter or coarse filter.
|
||||
|
Lack of engine oil.
|
Add oil.
|
||||
|
Insufficient oil pump supply.
|
Replace oil pump.
|
||||
|
Other
|
Oil leak.
|
Repair.
|
|||
|
Broken cylinder head gasket.
|
Replace gasket.
|
||||
|
STATE
|
Probable Cause
|
elimination
|
|||
|
Insufficient fuel consumption.
|
compression pressure drop
|
||||
|
Fuel system malfunction
|
Leak in fuel tank or fuel line.
|
Repair or replace the fuel tank or fuel line.
|
|||
|
Ignition system malfunction
|
The setting of the ignition timing is violated.
|
Correct the ignition timing.
|
|||
|
Faulty spark plug (large soot, gap broken, electrode burnt out).
|
Replace spark plug.
|
||||
|
Cooling system failure
|
Thermostat failure.
|
Replace thermostat.
|
|||
|
Other
|
Incorrect valve setting.
|
Repair or replace valve.
|
|||
|
Clutch slip.
|
Repair or replace clutch.
|
||||
|
Low tire pressure.
|
Bring tire pressure up to standard.
|
||||
|
STATE
|
Probable Cause
|
elimination
|
|||
|
Increased engine oil consumption
|
Engine oil leak
|
The oil drain plug has loosened.
|
Pull up the plug.
|
||
|
Oil pan bolts loose.
|
Tighten the bolts.
|
||||
|
Bad oil filter.
|
Pull up the filter.
|
||||
|
Weakening of the pressure switch in the oil line.
|
Pull up the switch.
|
||||
|
Violation of tightness in the front camshaft oil seal.
|
Replace seal.
|
||||
|
Violation of tightness in the front crankshaft oil seal.
|
Replace seal.
|
||||
|
Leakage through the cylinder head cover gasket.
|
Replace gasket.
|
||||
|
Cylinder head gasket damage.
|
Replace gasket.
|
||||
|
Mixing with oil in the combustion chamber.
|
Stuck piston ring.
|
Remove carbon deposits and replace ring.
|
|||
|
Piston or cylinder wear.
|
Replace piston or cylinder.
|
||||
|
Worn piston ring or ring groove.
|
Replace piston or ring.
|
||||
|
The location of the cutting part of the piston ring is broken.
|
Adjust location.
|
||||
|
Abrasion or damage to the valve system.
|
Replace valve system.
|
||||
|
Low oil pressure
|
Lubrication system failure
|
Incorrect oil viscosity.
|
Replace with the specified variety.
|
||
|
Weakening of the pressure switch in the oil line.
|
Pull up the switch.
|
||||
|
Lack of engine oil.
|
Add oil.
|
||||
|
Clogged oil filter.
|
Clear filter.
|
||||
|
Decreased performance of the oil pump.
|
Replace pump.
|
||||
|
Abrasion or damage to the oil pump relief valve.
|
Replace valve.
|
||||
|
STATE
|
Probable Cause
|
elimination
|
|||
|
Noise in the engine
|
Valve noise
|
Incorrect valve clearance.
|
Adjust valve clearance.
|
||
|
Abrasion of the valve stem or guide.
|
Replace valve stem or guide.
|
||||
|
Weakened valve spring.
|
Replace spring.
|
||||
|
Noise from piston, ring, cylinder
|
Piston, ring or cylinder wear.
|
Cylinder bore or piston, ring or cylinder replacement.
|
|||
|
Noise from the crank
|
Abrasion of connecting rod bearing.
|
Replace bearing.
|
|||
|
The connecting rod nut loosened.
|
Tighten to the specified tightening torque.
|
||||
|
Noise from crankshaft
|
Abrasion of the main bearing.
|
Replace bearing.
|
|||
|
Abrasion of the crankshaft journal.
|
Grind or replace the crankshaft journal.
|
||||
|
The bearing cover bolt has loosened.
|
Tighten to the specified tightening torque.
|
||||
|
Increased clearance in the crankshaft thrust bearing.
|
Adjust or replace.
|
||||
|
Low oil pressure.
|
Cm. "Low oil pressure" in this section.
|
||||