Monday, November 12, 2012

Troubleshooting and Repair of Internal Combustion Engine (Diesel, Gasoline):

Listed below are some of the common engine problems or troubles and their possible causes


- Empty fuel tank

- Fuel is old, dirty, or contaminated

- Fuel pump not working

- Fuel supply hose damaged, distorted, or improperly attached

- Inappropriate, clogged, or faulty spark plugs

- Loose plug wires

- Starter motor is not operational

- Battery is undercharged

- Ignition coil not functional

- Broken ignition switch

- Faulty wiring and connection problems in the ignition system

Possible causes: Engine stalls

- Fuel supply hose damaged, distorted, or improperly attached

- Fuel tank empty

- Fuel filter is clogged up

- Fuel is old, dirty, or contaminated

- Fuel supply hose damaged, distorted, or improperly attached

- Closed fuel tank vent

- Inoperative, or clogged thermostat

- Wrong engine oil

- Spark plugs defective, wrong, plugged, or incorrect spark-plug gap

Possible causes: Engine knocks

- clogged Carburetor

- Ignition Distributor problems

- plugged fuel Injectors

- Valve timing fails, or faulty

- failed or loose timing belt tensioner

- lean air-to-fuel mixture

- using fuel of lower than recommended Octane Rating

- too high engine compression

- Anti-Knock sensors malfunction

- Engine is too hot

- lack of proper exhaust gas recirculation

- air conditioning compressor fails or ices up

- Carbon deposits in the combustion chamber, pistons, cylinders, valves, or exhaust system lines

- Faulty or defective main crankshaft bearings

- water pump bearing is worn out

- Alternator rotor has worn bearings

- Flywheel is broken or has cracks

Possible causes: Engine idle not smooth

- Carburetor is flooded

- Fuel hose crushed or twisted

- Fuel filter clogged

- Fuel being used is contaminated or old and stale

- Throttle linkage sticking

- Spark plugs defective, wrong, plugged, or incorrect spark-plug gap

- Ignition problems occur in one or more cylinders

- Ignition wires maybe cracking or broken

- improper connection at both distributor cap and spark plugs

- clogged catalytic converter

- exhaust system is restricted or has blockage

Possible causes: Engine speed is low or not increasing

- Fuel filter is clogged

- Fuel supply hose incorrectly connected, broken, or twisted

- Fuel is old, dirty, or contaminated

- Spark plugs defective, wrong, plugged, or incorrect spark-plug gap

- Low engine oil level

Possible causes: Engine smokes

- engine is burning oil

- worn or broken piston rings

- worn or damaged cylinders

- worn valve guide or valve guide seals

- engine is burning coolant or transmission fluid

- leaking head gasket

- broken or cracked cylinder head

- Air filter is clogged

- Air/fuel mixture is too rich

- stuck automatic choke in the carburetor

- leaky fuel injector

- fuel pressure is too much

Possible causes: Engine overheating

- Overloading

- Water pump failure

- loose water pump impeller

- Clogged water lines

- Defective or clogged Thermostat

- Oil pump is faulty or not functional

- Engine oil level is too low

- Using old, contaminated, or incorrect engine oil

- Using spark plugs with inappropriate heat-range

- low coolant level, coolant leak, or poor coolant circulation

- faulty coolant sensor or air trapped under the sensor

- accumulated deposits in the water jackets

- fan clutch slips or misses

- cooling fan failure

- broken, cracked radiator hose

- ruptured or broken  radiator cap

- poor airflow through the radiator

- Radiator is poor or inefficient

1 comment:

  1. These are great basic troubleshooting skills that you can use in case of trouble where in there is no professional that can help you. driver should have these skills accompanied with good set of tools.

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