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Home >> Mazda >> 2005 >> B2300 Standard >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Symptom Troubleshooting [Engine) >> Symptom Troubleshooting Chart - Engine Mechanical

Symptom Troubleshooting Chart - Engine Mechanical

SYMPTOM TROUBLESHOOTING CHART - ENGINE MECHANICAL

Symptom Troubleshooting Chart - Engine Mechanical
Problem Possible Cause Action
  • Difficult Starting
  • Damaged ignition system.
 
  • Damaged fuel system.
 
  • Damaged starting system.
 
  • Damaged charger system/battery.
 
  • Burnt valve.
 
  • Worn piston.
 
  • Worn piston rings.
 
  • Worn cylinder.
 
  • Damaged head gasket.
  • Poor Idling
  • Vacuum leaks.
 
  • Malfunctioning or damaged ignition system.
 
  • Malfunctioning or damaged fuel system.
 
  • Damaged valve tappet (2.3L and 4.0L engine).
 
  • Damaged valve tappet guide or lash adjuster (3.0L engine).
  • Improper valve-to-valve seat contact.
  • Repair or replace valve or valve seat.
 
  • Damaged head gasket.
  • Abnormal Combustion
  • Malfunctioning or damaged fuel system.
 
  • Malfunctioning or damaged ignition system.
 
  • Damaged valve tappet (2.3L and 4.0L engine).
 
  • Damaged valve tappet guide or valve tappet (3.0L engine).
 
  • Burnt or sticking valve.
 
  • Weak or broken valve spring.
 
  • Carbon accumulation in combustion chamber.
  • Eliminate carbon buildup.
  • Excessive Oil Consumption
  • Leaking oil.
  • Repair oil leakage.
 
  • Malfunctioning PCV system.
  • Repair or replace the necessary components.
 
  • Worn valve stem seal.
 
  • Worn valve stem or valve guide.
 
  • Sticking piston rings.
 
  • Worn piston ring groove.
 
  • Worn piston or cylinder.
  • Engine Noise
  • Leaking exhaust system.
  • Repair exhaust leakage.
 
  • Improper drive belt tension.
 
  • Malfunction generator bearing.
 
  • Malfunctioning water pump bearing.
 
  • Malfunctioning or damaged cooling system.
 
  • Malfunctioning or damaged fuel system.
 
  • Loose timing chain/belt.
 
  • Damaged timing chain tensioner.
  • Excessive main bearing clearance.
  • Adjust clearance or replace crankshaft main bearing.
 
  • Seized or heat damaged crankshaft main bearing.
 
  • Excessive crankshaft end play.
  • Excessive connecting rod bearing clearance.
  • Replace connecting rod bearing or connecting rod.
 
  • Heat damaged connecting rod bearing.
 
  • Damaged connecting rod bushing.
  • Worn cylinder.
  • Repair or replace cylinder block.
 
  • Worn piston or piston pin.
 
  • Damaged piston rings.
 
  • Bent connecting rod.
 
  • Malfunctioning valve tappet or lash adjuster.
 
  • Excessive valve tappet or lash adjuster clearance.
  • Broken valve spring.
  • Replace valve spring.
 
  • Excessive valve guide clearance.
  • Insufficient Power
  • Malfunctioning or damaged ignition system.
 
  • Malfunctioning or damaged fuel system.
 
  • Damaged or plugged exhaust system.
  • Inspect exhaust system.
 
  • Incorrect tire size.
  • See owners manual.
 
  • Dragging brakes.
 
  • Slipping transmission.
 
  • Malfunctioning valve tappet (2.3L and 4.0L engine).
 
  • Damaged valve tappet guide or valve tappet (3.0L engine).
 
  • Compression leakage at valve seat.
  • Seized valve stem.
  • Replace valve stem.
 
  • Weak or broken valve spring.
 
  • Worn or damaged cam.
 
  • Damaged head gasket.
 
  • Cracked or distorted cylinder head.
  • Damaged, worn or sticking piston ring(s).
  • Repair or replace piston ring(s).
 
  • Worn or damaged piston.