Isuzu 1999 RODEO Workshop Manual page 514

Rough Engine Idling or Engine Stalling
Condition
Trouble in fuel injection system
Trouble in emission control system
Others
ENGINE MECHANICAL (X22SE 2.2L)
Possible cause
Idle air control valve defective
Throttle shutting off incomplete
Throttle position sensor circuit open
or shorted
Fuel injector circuits open or shorted
Fuel injectors damaged
Fuel pump relay defective
Manifold Absolute Pressure Sensor
cable disconnected or broken
Manifold Absolute Pressure Sensor
defective
Engine Coolant Temperature Sensor
cable disconnected or broken
Engine Coolant Temperature Sensor
defective
Intake Air Temperature sensor cable
disconnected or broken
Intake Air Temperature
defective
Knock Sensor (KS) circuits open or
shorted
KS defective
KS Module circuits open or ground
KS Module defective
Vehicle Speed Sensor circuit open or
shorted
Vehicle Speed Sensor defective
Powertrain Control Module defective
Exhaust Gas Recirculation Valve
faulty
Canister purge solenoid circuit open
Canister purge solenoid defective
Evaporative Emission
Purge control valve defective
Trouble in ignition system
Engine lacks compression
Valve incorrectly seated
Air Cleaner Filter clogged
Valve timing incorrect
Idle air control valve broken
Correction
Replace
Correct or replace
Correct or replace
Correct or replace
Replace
Replace
Correct or replace
Replace
Correct or replace
Replace
Correct or replace
sensor Replace
Correct or replace
Replace
Correct or replace
Replace
Correct or replace
Replace
Replace
Replace
Correct
Replace
Canister Replace
Refer to Hard Start Troubleshooting
Guide
Refer to Hard Start Troubleshooting
Guide
Lap valve
Replace filter element
Readjust
Replace
6A–5