Opel Frontera UE. Manual - part 749

ENGINE MECHANICAL (X22SE 2.2L)

6A–5

4. Engine Lacks Compression

Engine Compression Test Procedure

1. Start and run the engine until the engine reaches 

normal operating temperature.

2. Turn the engine off.

3. Remove all the spark plugs.

4. Remove ignition coil fuse (15A) and disable the 

ignition system.

5. Remove the fuel pump relay from the relay and fuse 

box.

6. Engage the starter and check that the cranking 

speed is approximately 300 rpm.

7. Install cylinder compression gauge into spark plug 

hole.

8. With the throttle valve opened fully, keep the starter 

engaged until the compression gage needle 
reaches the maximum level. Note the reading.

9. Repeat the test with each cylinder.

The pressure difference between the individual 
cylinders should not exceed 100kPa (14.5psi).

Condition

Possible cause

Correction

Engine lacks compression

Spark plug loosely fitted or spark 
plug gasket defective

Tighten to specified torque or 
replace gasket

Valve timing incorrect

Adjust

Cylinder head gasket defective

Replace gasket

Valve incorrectly seated

Lap valve

Valve stem seized

Replace valve and valve guide

Valve spring weakened

Replace

Cylinder or piston rings worn

Overhaul engine

Piston ring seized

Overhaul engine.

6A–6

ENGINE MECHANICAL (X22SE 2.2L)

Rough Engine Idling or Engine Stalling

Condition

Possible cause

Correction

Trouble in fuel injection system

Idle air control valve defective

Replace

Throttle shutting off incomplete

Correct or replace

Throttle position sensor circuit open 
or shorted

Correct or replace

Fuel injector circuits open or shorted

Correct or replace

Fuel injectors damaged

Replace

Fuel pump relay defective

Replace

Manifold Absolute Pressure Sensor 
cable disconnected or broken

Correct or replace

Manifold Absolute Pressure Sensor 
defective

Replace

Engine Coolant Temperature Sensor 
cable disconnected or broken

Correct or replace

Engine Coolant Temperature Sensor 
defective

Replace

Intake Air Temperature sensor cable 
disconnected or broken

Correct or replace

Intake Air Temperature sensor 
defective

Replace

Knock Sensor (KS) circuits open or 
shorted

Correct or replace

KS defective

Replace

KS Module circuits open or ground

Correct or replace

KS Module defective

Replace

Vehicle Speed Sensor circuit open 
or shorted

Correct or replace

Vehicle Speed Sensor defective

Replace

Trouble in emission control system

Powertrain Control Module defective

Replace

Exhaust Gas Recirculation Valve 
faulty

Replace

Canister purge solenoid circuit open

Correct

Canister purge solenoid defective

Replace

Evaporative Emission Canister 
Purge control valve defective

Replace

Trouble in ignition system

Refer to Hard Start Troubleshooting 
Guide

Others

Engine lacks compression

Refer to Hard Start Troubleshooting 
Guide

Valve incorrectly seated

Lap valve

Air Cleaner Filter clogged

Replace filter element

Valve timing incorrect

Readjust

Idle air control valve broken

Replace

ENGINE MECHANICAL (X22SE 2.2L)

6A–7

Rough Engine Running

Condition

Possible cause

Correction

Engine misfires regularly

Ignition coil layer shorted

Replace

Spark plugs fouling

Clean or install hotter type plug

Spark plug(s) insulator nose leaking

Replace

Fuel injector(s) defective

Replace

Engine control module faulty

Replace

Engine knocks regularly

Spark plugs running too hot

Install colder type spark plugs

Powertrain control module faulty

Replace

Engine lacks power

Spark plugs fouled

Clean

Fuel injectors defective

Replace

Manifold Absolute Pressure (MAP) 
Sensor or Manifold Absolute 
Pressure Sensor circuit defective

Correct or replace

Engine Coolant Temperature Sensor 
or Engine Coolant Temperature 
Sensor circuit defective

Correct or replace

Engine Control Module faulty

Replace

Intake Air Temperature Sensor or 
Intake Air Temperature Sensor 
circuit defective

Correct or replace

Throttle Position Sensor or Throttle 
Position Sensor circuit defective

Correct or replace

Knock Sensor or Knock Sensor 
circuits defective

Correct or replace

Knock Sensor Module or Knock 
Sensor Module circuits defective

Correct or replace

6A–8

ENGINE MECHANICAL (X22SE 2.2L)

Hesitation

Condition

Possible cause

Correction

Hesitation on acceleration

Throttle Position Sensor adjustment 
incorrect

Replace throttle valve assembly

Throttle Position Sensor circuit open 
or shorted

Correct or replace

Excessive play in accelerator 
linkage

Adjust or replace

Manifold Absolute Pressure (MAP) 
Sensor circuit open or shorted

Correct or replace

MAP Sensor defective

Replace

Intake Air Temperature (IAT) Sensor 
circuit open or shorted

Correct or replace

Knock Sensor (KS) Circuit open or 
shorted

Correct or replace

KS defective

Replace

KS Module circuits open or shorted

Correct or replace

KS Module defective

Replace

IAT Sensor defective

Replace

Hesitation at high speeds
(Fuel pressure too low)

Fuel tank strainer clogged

Clean or replace

Fuel pipe clogged

Clean or replace

Fuel filter clogged

Replace

Defective fuel pump system

Check and replace

Fuel Pressure Control Valve leaking

Replace

Hesitation at high speeds
(Fuel injector not working normally)

Power supply or ground circuit for 
Multiport Fuel Injection System 
shorted or open

Check and correct or replace

Cable of Multiport Fuel Injection 
System disconnected or defective

Correct or replace

Hesitation at high speeds

Engine Control Module defective

Replace

Throttle Position Sensor circuit open 
or shorted

Correct or replace

Throttle Position Sensor defective

Replace

Engine Coolant Temperature Sensor 
circuit open or shorted

Correct or replace

Engine Coolant Temperature Sensor 
defective

Replace

MAP Sensor cable open or shorted

Correct or replace

MAP Sensor defective

Replace

IAT Sensor circuit open or shorted

Correct or replace

IAT Sensor defective

Replace

KS Circuit open or shorted

Correct or replace

KS defective

Replace

KS Module circuit open or shorted

Correct or replace

KS Module defective

Replace

Throttle valve not wide opened

Check and correct or replace

Air Cleaner Filter clogged

Replace filter element

Power supply voltage too low

Check and correct or replace