Isuzu 1999 RODEO Workshop Manual page 516

Hesitation
Condition
Hesitation on acceleration
Hesitation at high speeds
(Fuel pressure too low)
Hesitation at high speeds
(Fuel injector not working normally)
Hesitation at high speeds
ENGINE MECHANICAL (X22SE 2.2L)
Possible cause
Throttle Position Sensor adjustment
incorrect
Throttle Position Sensor circuit open
or shorted
Excessive play in accelerator linkage
Manifold Absolute Pressure (MAP)
Sensor circuit open or shorted
MAP Sensor defective
Intake Air Temperature (IAT) Sensor
circuit open or shorted
Knock Sensor (KS) Circuit open or
shorted
KS defective
KS Module circuits open or shorted
KS Module defective
IAT Sensor defective
Fuel tank strainer clogged
Fuel pipe clogged
Fuel filter clogged
Defective fuel pump system
Fuel Pressure Control Valve leaking
Power supply or ground circuit for
Multiport Fuel Injection System
shorted or open
Cable of Multiport Fuel Injection
System disconnected or defective
Engine Control Module defective
Throttle Position Sensor circuit open
or shorted
Throttle Position Sensor defective
Engine Coolant Temperature Sensor
circuit open or shorted
Engine Coolant Temperature Sensor
defective
MAP Sensor cable open or shorted
MAP Sensor defective
IAT Sensor circuit open or shorted
IAT Sensor defective
KS Circuit open or shorted
KS defective
KS Module circuit open or shorted
KS Module defective
Throttle valve not wide opened
Air Cleaner Filter clogged
Power supply voltage too low
Correction
Replace throttle valve assembly
Correct or replace
Adjust or replace
Correct or replace
Replace
Correct or replace
Correct or replace
Replace
Correct or replace
Replace
Replace
Clean or replace
Clean or replace
Replace
Check and replace
Replace
Check and correct or replace
Correct or replace
Replace
Correct or replace
Replace
Correct or replace
Replace
Correct or replace
Replace
Correct or replace
Replace
Correct or replace
Replace
Correct or replace
Replace
Check and correct or replace
Replace filter element
Check and correct or replace
6A–7