Ignition - Jeep UNIVERSAL CJ-2A Service Manual

E
F4-134 ENGINE
E-113. SERVICE DIAGNOSIS
Poor Fuel Economy
Ignition Timing Slow or Spark Advance
St~ck
Carburetor Float High
Accelerator Pump Not Properly Adjusted
High Fuel Pump Pressure
Fuel Leakage
Leaky Fuel Pump Diaphragm
Loose Engine Mounting Causing High Fuel Level
in Carburetor
Low Compression
Valves Sticking
Spark Plugs Bad
Spark Plug Cables Bad
Weak Coil or Condenser
Improper Valve Tappet Clearance
Carburetor Air Cleaner Dirty
High Oil Level in Air Cleaner
Dragging Brakes
Front Wheels Out of Alignment
Tires Improperly Inflated.
Inaccurate Odometer
Faulty Fuel Tank Cap
Clogged Muffler or Bent Exhaust Pipe
Lack of'.Rower
Low Compression
Ignition System (Timing Late)
Improper Functioning Carburetor or Fuel Pump
Fuel Lines Clogged
Air Cleaner Restricted
Engine Temperature High
Improper Tappet Clearance
Sticking Valves
Valve Timing Late
Leaky Gaskets
Muffler Clogged
Bent Exhaust Pipe
Defective Spark Plugs-Clean oc Replace
Defective Breaker Points-Replace Points
Incorrect Breaker Point Gap--Reset Points
Defective Condenser or Coil-Replace
Loose Electrical Connections-Locate and
Tighten
Broken Valve Spring-Replace Spring
Broken Piston or Rings-Replace
Defective Head Gasket-Replace Gasket
Cracked Distributor Cap--Replace Cap
Low Compression
Leaky Valves
Poor Piston Ring Seal
Sticking Valves
Valve Spring Weak or Broken
Cylinder Scored or Worn
Tappet Clearance Incorrect
Piston Clearance too Large
Leaky Cylinder Head Gasket
Burned Valves and Seats
Sticking Valves or too Loose in Guides
Improper Timing
Excessive Carbon Around Valve Head and Seat
Overheating
Valve Spring Weak or Broken
88
Burned Valves and Seats-continued
Valve Tappet Sticking
Valve Tappet Clearance Incorrect
Clogged Exhaust System
Valves Sticking
Warped Valve
Improper Tappet Clearance
Carbonized or Scored Valve Stems
Insufficient Clearance Valve Stem to Guide
Weak or Broken Valve Spring
Valve Spring Cocked
Contaminated Oil
Overheating
Inoperative Cooling System
Thermostat Inoperative
Improper Ignition Timing
Improper Valve Timing
Excessive Carbon Accumulation
Fan Belt too Loose
Clogged Muffler or Bent Exhaust Pipe
Oil System Failure
Scored or Leaky Piston Rings
Popping-Spitting-Detonation
Improper Ignition
Improper Carburetion
Excessive Carbon Deposit in Combustion Cham-
bers
Poor Valve Seating
Sticking Valves
Broken Valve Spring
Tappets Adjusted too Close
Spark Plug Electrodes Burned
Water or Dirt in Fuel
Clogged Lines
Improper Valve Timing
Excessive Oil Comsumption
Piston Rings Stuck in Grooves, Worn or Broken
Piston Rings Improperly Fitted or Weak
Piston Ring Oil Return Holes Clogged
Excessive Clearance, Main and Connecting Rod
Bearings
Oil Leaks at Gaskets or Oil Seals
Excessive Clearance, Valve Stem to Valve Guide
(Intake)
Cylinder Bores Scored, Out-of-Round or Tapered
Too Much Clearance, Piston to Cylinder Bore
Misaligned Connecting Rods
High Road Speeds or Temperature
Crankcase Ventilator Not Operating
Bearing Failure
Crankshaft Bearing Journal Out-of-Round
Crankshaft Bearing Journal Rough
Lack of Oil
Oil Leakage
Dirty Oil
Low Oil Pressure or Oil Pump Failure
Drilled Passages in Crankcase or Crankshaft
Clogged
Oil Screen Dirty
Connecting Rod Bent