Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1204

6A–13

ENGINE MECHANICAL (Y22SE 2.2L)

Engine Oil Consumption Excessive

Condition

Possible cause

Correction

Oil leaking

Oil pan drain plug loose

Retighten or replace gasket

Oil pan setting bolts loosened

Retighten

Oil pan gasket broken

Replace gasket

Front cover retaining bolts loose or
gasket broken

Retighten or replace gasket

Head cover retaining bolts loose or
gasket broken

Retighten or replace gasket

Oil filter adapter cracked

Replace

Oil filter attachings bolt loose or
rubber gasket broken

Retighten or replace oil filter

Crankshaft front or rear oil seal
defective

Replace oil seal

Oil pressure unit loose or broken

Retighten or replace

Blow–by gas hose broken

Replace hose

Engine/Transmission coupling area

Replace oil seal

Oil leaking into combustion
chambers due to poor seal in valve

Valve stem oil seal defective

Replace

chambers due to  oor seal in valve
system

Valve stem or valve guide worn

Replace valve and valve guide

Oil leaking into combustion
chambers due to poor seal in cylinder

t

Cylinders and pistons worn
excessively

Rebore cylinder and replace pistons
and others

parts

Piston ring gaps incorrectly
positioned

Correct

Piston rings set with wrong side up

Correct

Piston ring sticking

Rebore cylinder and replace pistons
and others

Piston ring and ring groove worn

Replace pistons and others

Return ports in oil rings clogged

Clean piston and replace rings

Crank case ventilation, Positive
Crankcase Ventilation System
malfunctioning

Positive Crankcase Ventilation Hose
clogged

Clean

Others

Improper oil viscosity

Use oil of recommended S.A.E.
viscosity

Continuous high speed driving
and/or severe usage such as trailer
towing

Continuous high speed operation
and/or severe usage will normally
cause increased oil consumption

6A–14

ENGINE MECHANICAL (Y22SE 2.2L)

Fuel Consumption Excessive

Condition

Possible cause

Correction

Trouble in fuel system

Mixture too rich or too lean due to
trouble in fuel injection system

Refer to “Abnormal Combustion”

Fuel cut function does not act

Refer to “Abnormal Combustion”

Trouble in ignition system

Misfiring or abnormal combustion
due to trouble in ignition system

Refer to Hard Start or Abnormal
Combustion Troubleshooting Guide

Others

Engine idle speed too high

Reset Idle Air Control Valve

Returning of accelerator control
sluggish

Correct

Fuel system leakage

Correct or replace

Clutch slipping

Correct

Brake drag

Correct

Selection of transmission gear
incorrect

Caution operator of incorrect gear
selection

Excessive Exhaust Gas
Recirculation flow due to trouble in
Exhaust Gas Recirculation system

Refer to Abnormal Combustion

Oil Problems

Condition

Possible cause

Correction

Oil pressure too low

Wrong oil in use

Replace with correct engine oil

Relief valve sticking

Replace

Oil pump not operating properly

Correct or replace

Oil pump strainer clogged

Clean or replace strainer

Oil pump worn

Replace

Oil pressure gauge defective

Correct or replace

Crankshaft bearing or connecting
rod bearing worn

Replace

Oil contamination

Wrong oil in use

Replace with new engine oil

Oil filter clogged

Replace oil filter

Cylinder head gasket damage

Replace gasket

Burned gases leaking

Replace piston and piston rings or
rebore cylinders

Oil not reaching valve system

Oil passage in cylinder head or
cylinder body clogged

Clean or correct

Engine Oil Pressure Check

1. Check for dirt, gasoline or water in the engine oil.

a. Check the viscosity of the oil.
b. Change the oil if the viscosity is outside the

specified standard.

c. Refer to the “Maintenance and Lubrication” section

of this manual.

2. Check the engine oil level.

The level should fall somewhere between the “ADD”
and the “FULL” marks on the oil level dipstick.
If the oil level does not reach the “ADD” mark on the
oil level dipstick, engine oil must be added.

3. Remove the oil pressure unit.
4. Install an oil pressure gauge.
5. Start the engine and allow the engine to reach normal

operating temperature (About 80

°

C).

6. Measure the oil pressure.

Oil pressure should be:

150 kPa (21.8 psi) at idle speed.

7. Stop the engine.
8. Remove the oil pressure gauge.
9. Install the oil pressure unit.

10. Start the engine and check for leaks.

6A–15

ENGINE MECHANICAL (Y22SE 2.2L)

Malfunction Indicator Lamp

The instrument panel “CHECK ENGINE” Malfunction
Indicator Lamp (MIL) illuminates by self diagnostic
system when the system checks the starting of engine, or
senses malfunctions.

Condition

Possible cause

Correction

“CHECK ENGINE” MIL does not
illuminate at the starting of engine

Bulb defective

Replace

illuminate at the starting of engine

MIL circuit open

Correct or replace

Command signal circuit to operate
self diagnostic system shorted

Correct or replace

Powertrain Control Module (PCM)
cable loosely connected,
disconnected or defective

Correct or replace

PCM defective

Replace

“CHECK ENGINE” MIL illuminates,
and stays on

Deterioration heated oxygen sensor
of internal element

Replace

Heated oxygen sensor connector
terminal improper contact

Reconnect properly

Heated oxygen sensor lead wire
shorted

Correct

Heated oxygen sensor circuit open

Correct or replace

Deterioration engine coolant
temperature sensor of internal
element

Replace

Engine coolant temperature sensor
connector terminal improper contact

Reconnect properly

Engine coolant temperature sensor
lead wire shorted

Correct

Engine coolant temperature sensor
circuit open

Correct or replace

Throttle position sensor open or
shorted circuits

Correct or replace

Deterioration of crankshaft position
sensor

Replace

Crankshaft position sensor circuit
open or shorted

Correct or replace

Vehicle speed sensor circuit open

Correct or replace

Manifold absolute pressure sensor
circuit open or shorted

Correct or replace

Intake air temperature sensor circuit
open or shorted

Correct or replace

Fuel injector circuit open or shorted

Correct or replace

PCM driver transistor defective

Replace PCM

Malfunctioning of PCM RAM
(Random Access Memory) or ROM
(Read Only Memory)

Replace PCM

6A–16

ENGINE MECHANICAL (Y22SE 2.2L)

Cylinder Head Cover

Cylinder Head Cover and Associated Parts

010R100006

Legend

(1) Ignition Cable Cover

(2) Spark Plug
(3) Cylinder Head Cover

Removal

1. Disconnect battery ground cable.
2. Disconnect PCV hose from cylinder head cover.
3. Remove intake duct.
4. Remove left side ground cable from cylinder head

cover and disconnect ground cable connector on the
left side wheel arch. Remove right side ground cable
from generator stay and disconnect ground cable
connector on the right side wheel arch.

5. Disconnect three(black, green and blue colors)

engine wire harness connectors from chassis
harness of left rear side of compartment.

6. Disconnect cooling fan wire harness connector from

cooling fan on left side top of fan shroud.

7. Move drive belt tensioner to loose side using wrench

then remove drive belt.

033RW001

8. Remove PCV hose from cylinder block.
9. Remove intake duct stay from cylinder head.

10. Remove two bolts for remove ignition cable cover

from cylinder head cover.