Isuzu 1999 RODEO Workshop Manual page 517

6A–8 ENGINE MECHANICAL (X22SE 2.2L)
Engine Lacks Power
Condition
Trouble in fuel system
Trouble in intake or exhaust system
Ignition failure
Possible cause
Fuel Pressure Control Valve not
working normally
Fuel injector clogged
Fuel pipe clogged
Fuel filter clogged or fouled
Fuel pump drive circuit not working
normally
Fuel tank not sufficiently breathing
due to clogged Evaporative
Emission Control System circuit
Water in fuel system
Inferior quality fuel in fuel system
Engine Control Module supplied poor
voltage
Throttle Position Sensor
disconnected or broken
Throttle Position Sensor defective
Manifold Absolute Pressure Sensor
not working normally
Intake Air Temperature Sensor not
working normally
Engine Coolant Temperature Sensor
circuit open or shorted
Engine Coolant Temperature Sensor
defective
Engine Control Module defective
Air Cleaner Filter clogged
Air duct kinked or flattened
————
Heat range of spark plug inadequate
Electronic Ignition System
module
Correction
Replace
Clean or replace
Clean
Replace
Correct or replace
Clean or replace
Clean
Use fuel of specified octane rating
Correct circuit
cable Correct or replace
Replace
Replace
Replace
Correct or replace
Replace
Replace
Replace filter element
Correct or replace
Refer to Hard Start Troubleshooting
Guide
Install spark plugs of adequate heat
range
with Replace