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| Home / Car Engines / Nissan Engines / Nissan A15 |
Nissan A15 Troubleshooting
| Engine doesn't start or hard to start |
Empty fuel tank - Add gasoline.
Low-quality gasoline - Use quality gasoline.
Water or air in fuel system - Remove air or water from system.
Defective spark plug wire connection - Inspect spark plug wiring connection, change or repair.
Damaged spark plug - Change spark plug.
Defective ignition - Check ignition and replace faulty components.
Dirty fuel filter - Install new filter.
Clogged fuel lines - Fuel lines need to be cleaned.
Fuel pump is faulty or clogged - Clean or install new fuel pump.
Carburetor components worn out - Repair or replace parts.
Engine has low compression - Check cylinder block and replace defective parts.
| Engine runs intermittently |
Ignition system is defective - Inspect ignition system and change failed components.
Air filter is dirty - Replace or clean filter.
Faulty spark plug - Install new spark plug.
Fuel pump is faulty or clogged - Check fuel pump and change if required.
Valve clearance is not correct - Adjust valve clearance according to specifications.
Incorrect ignition timing - Adjust ignition timing correctly.
Low idle speed setting is not correct - Adjust idling as required.
| Engine starts but then stalls |
Spark plug is faulty - Spark plug need to be replaced.
Dirty or defective carburetor - Clean or change carburetor.
Ignition coil is damaged - Ignition coil should be replaced.
Worn or loose valve springs - Replace valve springs.
Stuck valves - Service the valves.
| Engine overheats |
Not enough engine oil - Fill the crankcase with engine oil.
Engine overload - Reduce engine load.
Too lean fuel mixture in carburetor - Use proper settings.
Ignition timing is incorrect - Set the ignition timing correctly.
Valve setting is wrong - Adjust valves correctly.
Dirty radiator core or faulty radiator cap - Replace cap or clean radiator.
Not enough coolant - Add coolant fluid and inspect the cooling system for leaks.
Thermostat is faulty - Change thermostat.
Water pump is defective - Replace water pump.
| Engine knocks or noises |
Low octane gasoline - Use proper gasoline.
Engine overloaded - Reduce load.
Low engine oil level - Fill up the oil to required level.
Improperly adjusted low idle speed - Correct idle adjustment.
Fuel pump is dirty or defective - Clean or change fuel pump.
Worn crankshaft or main bearings - Need to install new components.
Improper valve clearance - Adjustment procedure required.
Damaged piston rings or cylinder bore - Replace faulty parts.
| Engine power is too low |
Clogged or incorrectly adjusted carburetor - Clean or properly adjust carburetor.
Air filter element is clogged - Replace or clean air filter.
Fuel pump is damaged or dirty - Check fuel pump and change if required.
Ignition system malfunction - Check ignition system and replace faulty parts.
Cylinder head gasket is damaged - Cylinder-head gasket replacement required.
Burned or stuck valves - Service or change valves.
Faulty cylinder block parts - Change defective components.
Oil filter is dirty - Service or replace oil filter.
| High fuel consumption |
Plugged air filter - Service or change air filter.
Carburetor main jet is improperly adjusted - Adjust main jet as required.
Spark plug is loose or defective - Change or re-tighten spark plug.
Bad ignition timing - Ignition timing needs to be set properly.
Valves are worn, burned or stuck - Clean or replace valves.
Worn rings, piston, or sleeve - Change defective parts.
Excessive valve clearance - Check and adjust.
Engine has bad compression - Check cylinder block and change wear parts.
| High engine oil consumption |
Gaskets or seals are excessively worn - New components need to be installed.
Valve stems and guides are worn - Valves must be replaced.
Stuck or defective piston rings - Have piston rings replaced.
Damaged piston or cylinder liner - Inspect piston and liner, change as required.
| Engine backfires |
Too lean fuel mixture in carburetor - Set the carburetor properly.
Fuel lines clogging - Fuel lines need to be cleaned.
Ignition timing is improper - Ignition timing needs to be set properly.
Valve setting is improper - Adjust valves as required.
Air filter is blocked - Service or replace air filter.
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