Rough Engine Running - Isuzu C22NE Workshop Manual

Rough Engine Running

Condition
Engine misfires regularly
Engine knocks regularly
Engine lacks power
Possible cause
Ignition coil layer shorted
Spark plugs fouling
Spark plug(s) insulator nose
leaking
Fuel injector(s) defective
Engine control module faulty
Spark plugs running too hot
Powertrain control module faulty
Spark plugs fouled
Fuel injectors defective
Manifold Absolute Pressure (MAP)
Sensor or Manifold Absolute
Pressure Sensor circuit defective
Engine Coolant Temperature
Sensor or Engine Coolant
Temperature Sensor circuit
defective
Engine Control Module faulty
Intake Air Temperature Sensor or
Intake Air Temperature Sensor
circuit defective
Throttle Position Sensor or
Throttle Position Sensor circuit
defective
Knock Sensor or Knock Sensor
circuits defective
Knock Sensor Module or Knock
Sensor Module circuits defective
ENGINE DIAGNOSIS (C22NE, 22LE, 20LE) 6-5
Replace
Clean or install hotter type plug
Replace
Replace
Replace
Install colder type spark plugs
Replace
Clean
Replace
Correct or replace
Correct or replace
Replace
Correct or replace
Correct or replace
Correct or replace
Correct or replace
Correction