Opel Frontera UBS. Manual - part 2179

6E–289

ENGINE DRIVEABILITY AND EMISSIONS

Symptoms

Default Section(s)

Initial Diagnosis

Lack of Power, Sluggish or Spongy

1. OBD system check.
2. Fuel system diagnosis.
3. Ignition system.
4. Knock sensor.
5. EGR operation.
6. EGR system check.

Refer to 

Exhaust System in

Engine Exhaust, TCC Operation,
Calibration ID/Service Bulletins

Detonation/Spark Knock

1. OBD system check.
2. Transmission range switch.
3. EGR operation.
4. EGR system check.
5. TCC operation.
6. Fuel system diagnosis.
7. Ignition system.
8. Knock sensor.

TCC operation, Cooling System,
Ignition System Check,
Calibration ID/Service Bulletins

Hesitation, Sag, Stumble

1. OBD system check.
2. TP.
3. MAP output check.
4. Fuel system diagnosis.
5. Fuel injector and fuel injector

balance test.

6. Ignition system.

EGR Operation, EGR System
Check, Generator Output
Voltage (refer to 

Chassis

Electrical), Calibration ID/Service
Bulletins, Ignition System Check

Cuts Out, Misses

1. OBD system check.
2. Cylinder balance test.

Ignition System Check

Rough, Unstable, or Incorrect Idle,
Stalling

1. OBD system check.
2. Fuel injector and fuel injector

balance test.

3. Ignition system.
4. IAC operation.
5. EGR operation.

MAP Output Check, Throttle
Linkage, IAC System Check,
EGR System Check, A/C Clutch
Control Circuit Diagnosis,
Crankcase Ventilation System,
Calibration ID/Service Bulletins,
Generator Output Voltage (refer
to 

Chassis Electrical), Exhaust

Diagnosis

Poor Fuel Economy

1. OBD system check.
2. Careful visual/physical inspection.
3. Ignition system.
4. Cooling system.

TCC Operation, Exhaust System
(refer to 

Engine Exhaust)

Engine Cranks But Will Not Run

1. OBD system check.

Fuel System Electrical
Diagnosis, Fuel System
Diagnosis, Fuel Injector and Fuel
Injector Balance Test.

Excessive Exhaust Emissions or
Odors

1. OBD system check.
2. Emission test.
3. Cooling system.
4. Fuel system diagnosis.
5. Fuel injector and fuel injector

balance test.

6. Crankcase ventilation system.
7. Ignition system.
8. MAP output check.

EGR System Check, Exhaust
Diagnosis, Calibration ID/Service
Bulletins

Dieseling, Run-On

1. OBD system check.
2. Careful visual/physical inspection.
3. Fuel system diagnosis.

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6E–290

ENGINE DRIVEABILITY AND EMISSIONS

Symptoms

Default Section(s)

Initial Diagnosis

Backfire

1. OBD system check.
2. Ignition system.
3. Fuel system diagnosis.
4. Fuel injector and fuel injector

balance test.

5. EGR operation, EGR system

check.

Exhaust System Diagnosis,
Intake Casting Flash, Ignition
System Check

Catalyst Monitor

1. OBD system check.
2. Careful visual/physical inspection.
3. Heated oxygen sensors.

Exhaust System

Fuel Trim

1. OBD system check.
2. Careful visual/physical inspection.
3. Fuel system diagnosis.
4. Heated oxygen sensors, MAF

sensors.

Exhaust System Intake Air
System

Evaporative Emissions

1. OBD system check.
2. Careful visual/physical inspection.
3. Fuel system diagnosis.

—

Heated Oxygen Sensors

1. OBD system check.
2. Careful visual/physical inspection.

Exhaust System

6E–291

ENGINE DRIVEABILITY AND EMISSIONS

Camshaft Position (CMP)

Sensor

Removal Procedure

1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Remove the common chamber assembly.

Refer to Common Chamber in Engine Mechanical.

014RW120

4. Disconnect the electrical connector to the CMP

sensor.

014RV053

5. Remove the CMP retaining bolt from the side of left

cylinder head.

6. Remove the CMP sensor from the cylinder head.

Inspection Procedure

1. Inspect the sensor O-ring for cracks or leaks.
2. Replace the O-ring if it is worn or damaged.
3. Lubricate the new O-ring with engine oil.
4. Install the lubricated O-ring.

Installation Procedure

1. Install the CMP sensor in the cylinder head.
2. Install the CMP sensor retaining bolt.

Tighten

D

Tighten the retaining screw to 9 N·m (78 lb in.).

3. Connect the electrical connector to the CMP sensor.

014RV053

4. Install the common chamber assembly.

Refer to Common Chamber in Engine Mechanical.

014RW106

5. Install the engine cover.
6. Connect the negative battery cable.

6E–292

ENGINE DRIVEABILITY AND EMISSIONS

Crankshaft Position (CKP)

Sensor

Removal Procedure

1. Disconnect the negative battery cable.
2. Disconnect the electrical connector to the CKP

sensor.

3. Remove one bolt and the CKP sensor from the right

side of the engine block, just behind the mount.

NOTE: Use caution to avoid any hot oil that might drip
out.

TS22909

Inspection Procedure

1. Inspect the sensor O-ring for cracks or leaks.
2. Replace the O-ring if it is worn or damaged.
3. Lubricate the new O-ring with engine oil.
4. Install the lubricated O-ring.

Installation Procedure

1. Install the CKP sensor in the engine block.
2. Install the CKP sensor mounting bolt.

Tighten

D

Tighten the mounting bolt to 9 N·m (78 lb in.).

TS22909

3. Connect the electrical connector to the CKP sensor.
4. Connect the negative battery cable.

Engine Coolant Temperature

(ECT) Sensor

Removal Procedure

NOTE: Care must be taken when handling the engine
coolant temperature (ECT) sensor.  Damage to the ECT
sensor will affect proper operation of the fuel injection
system.

1. Disconnect the negative battery cable.
2. Drain the radiator coolant.  Refer to 

Draining and

Refilling Cooling System in Engine Cooling.

3. Disconnect the electrical connector.

014RW127