Spark Plugs - Jeep UNIVERSAL CJ-2A Service Manual

F
FUEL SYSTEM
F -52. SERVICE DiaGNOSIS
Symptoms
Probe~ble
Remedy
Excessive Fuel Consumption:
Tires improperly inflated ....................................... Inflate
Brakes drag .................................................. Adjust
Engine operates too cold ....................................... Check thermostat
Heat control valve inoperative ............... : .................. Check thermostatic spring
Leak in fuel line ............................................. Check all connections
Carburetor float level high ..................................... See "Carburetor" section
Accelerator pump not properly adjusted ......................... Adjust
Leaky fuel· pump diaphragm .................................... Replace
Loose engine mountings causing high carburetor fuel level. ......... Tighten
Ignition timing slow or spark advance stuck ...................... See "Distributor" section
Low compression .............................................. Check valve tappet clearance
Air cleaner dirty. . . . . . . . . . . . . . . . . . . . . . . ...................... Remove and clean
Engine Hesitates on Acceleration:
Accelerator pump does not function perfectly ..................... Replace piston and rod or adjust
Carburetor float level. ......................................... Adjust
Spark plugs .................................................. Replace or clean and adjust
Low compressiou .............................................. Check valves
Distributor points-dirty or pitted .............................. Replace
Weak condenser or coil ........................................ Replace
Carburetor jets restricted ...................................... Remove and clean
Excessive engine heat .......................................... See "Engine" section
Ens,.ine Stalls-Won't Idle:
Improper condition of carburetor ................................ See "Carburetor" section
Low speed jet restricted ........................................ Remove and clean
Dirty fuel sediment bowl screen .................................. Remove and clean
Air cleaner dirty. . . . . . . . . . . .................................. Remove and clean
Leaky manifold or gasket ....................................... Replace
Fuel pump diaphrag111 porous ................................... Replace
Loose carburetor ............................................... Tighten flange nuts
Water in fuel. ................................................ Drain and clean system
Improper ignition ............................................. See "Distributor" section
Spark plugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean and adjust
Valves sticking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grind valves
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