Opel Frontera UE. Manual - part 969

 

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Opel Frontera UE. Manual - part 969

 

 

6E2–262

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Rough, Unstable, or Incorrect Idle, Stalling Symptom

  (Cont'd)

Step

No

Yes

Value(s)

Action

10

1. Visually/physically inspect for the following

conditions:

D

Restricted air intake system.  Check for a
possible collapsed air intake duct, restricted
air filter element, or foreign objects blocking
the air intake system.

D

Throttle body.  Check for objects blocking the
IAC passage or throttle bore, excessive
deposits in the IAC passage and on the IAC
pintle, and excessive deposits in the throttle
bore and on the throttle plate.

D

Large vacuum leak.  Check for a condition that
causes a large vacuum leak, such as an
incorrectly installed or faulty crankcase
ventilation valve or a disconnected brake
booster hose.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 8

11

Check the injector connections.  If any of the injectors
are connected to an incorrect cylinder, correct as
necessary.

Was a problem found?

Verify repair

Go to 

Step 12

12

1. Perform the “Injector Coil/Balance Test” in 

Fuel

Metering System.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 13

13

1. Check for fuel in the pressure regulator vacuum

hose.

2. If fuel is present, replace the fuel pressure regulator

assembly.  Refer to 

Fuel Metering System.

3. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 14

14

1. Check for proper ignition voltage output with spark

tester 5-8840-0383-0.  Refer to 

Electronic Ignition

System for the procedure.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 15

15

1. Remove spark plugs.  Check for wet plugs, cracks,

wear, improper gap, burned electrodes, or heavy
deposits.  Refer to 

Electronic Ignition System.

NOTE: If spark plugs are gas or oil fouled, the cause of
the fouling must be determined before replacing the
spark plugs.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 16

16

1. Check for a loose ignition coil ground.

Refer to 

Electrical Ignition System.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 17

6E2–263

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Rough, Unstable, or Incorrect Idle, Stalling Symptom

  (Cont'd)

Step

No

Yes

Value(s)

Action

17

1. Check ignition coils for cracks or carbon tracking.
2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 18

18

Using a Tech 2, monitor the throttle position (TP) angle
with the engine idling.

Is the TP angle at the specified value and steady?

0%

Go to 

Step 19

Refer to 

DTC

P0123 for

further

diagnosis

19

1. Check the positive crankcase ventilation (PCV)

valve for proper operation.  Refer to 

Crankcase

Ventilation System.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 20

20

1. Check the transmission range switch circuit.  Use a

Tech 2 and be sure the Tech 2 indicates that the
vehicle is in drive with the gear selector in drive or
overdrive.

2. If a problem is found, diagnose and repair the

transmission range switch as necessary (refer to
4L30-E Automatic Transmission Diagnosis).

Was a problem found?

Verify repair

Go to 

Step 21

21

1. Check for the following engine mechanical items.

Refer to 

Engine Mechanical for diagnosis

procedures:

D

Low compression

D

Sticking or leaking valves

D

Worn camshaft lobe(s)

D

Camshaft drive belt slipped or stripped

D

Incorrect valve timing

D

Broken valve springs

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 22

22

1. Check for faulty motor mounts.  Refer to 

Engine

Mechanical for inspection of mounts.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 23

23

1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no

malfunctions have been found, review/inspect the
following:

D

Visual/physical inspection

D

Tech 2 data

D

Freeze Frame data/Failure Records buffer

D

All electrical connections within a suspected
circuit and/or system.

3. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Contact

Technical

Assistance

6E2–264

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Poor Fuel Economy Symptom

 

Step

Action

Value(s)

Yes

No

1

DEFINITION:
Fuel economy, as measured by an actual road test, is
noticeably lower than expected.  Also, economy is
noticeably lower than it was on this vehicle at one time,
as previously shown by an actual road test. (Larger than
standard tires will cause odometer readings to be
incorrect, and that may cause fuel economy to appear
poor when it is actually normal.)

Was the “On-Board Diagnostic (OBD) System Check”
performed?

Go to 

Step 2

Go to 

OBD

System

Check

2

1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,

correct the condition as instructed in the bulletin.

Was a bulletin found that addresses the symptom?

Verify repair

Go to 

Step 3

3

Was a visual/physical check performed?

Go to 

Step 4

Go to

Visual/Physic

al Check

4

Check owner’s driving habits.

D

Is the A/C “ON” full time (defroster mode “ON”)?

D

Are tires at the correct pressure?

D

Are excessively heavy loads being carried?

D

Is acceleration too much, too often?

Was a problem found?

Go to 

Step 5

Go to 

Step 6

5

Review the items in Step 4 with the customer and
advise as necessary.

Is the action complete?

System OK

6

1. Visually/physically check:  Vacuum hoses for splits,

kinks, and improper connections and routing as
shown on the “Vehicle Emission Control
Information” label.

2. If a problem is found, repair as necessary.

Was a repair required?

Verify repair

Go to 

Step 7

7

1. Remove and check the air filter element for dirt or for

restrictions. Refer to 

Air Intake System.

2. Replace the air filter element if necessary.

Was a repair required?

Verify repair

Go to 

Step 8

8

1. Remove spark plugs and check for wet plugs,

cracks, wear, improper gap, burned electrodes, or
heavy deposits.  Refer to 

Spark Plug Replacement.

NOTE: If spark plugs are gas or oil fouled, the cause of
the fouling must be determined before replacing the
spark plugs.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 9

9

1. Check for low engine coolant level.  Refer to 

Engine

Cooling.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 10

6E2–265

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Poor Fuel Economy Symptom

  (Cont'd)

Step

No

Yes

Value(s)

Action

10

1. Check for an incorrect or faulty engine thermostat.

Refer to 

Engine Cooling.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 11

11

1. Check for low engine compression.  Refer to 

Engine

Mechanical.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 12

12

1. Check the TCC operation.  Refer to 

4L30-E

Transmission Diagnosis.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 13

13

1. Check the exhaust system for possible restriction:

D

Inspect the exhaust system for damaged or
collapsed pipes.

D

Inspect the muffler for heat distress or possible
internal failure.

D

Check for a possible plugged three-way
catalytic converter by checking the exhaust
system back pressure.  Refer to 

Restricted

Exhaust System Check.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 14

14

Check for proper calibration of the speedometer.

Does the speed indicated on the speedometer closely
match the vehicle speed displayed on the Tech 2?

Go to 

Step 16

Go to 

Step 15

15

Diagnose and repair an inaccurate speedometer
condition as necessary.  Refer to 

Vehicle Speed

Sensor in Electrical Diagnosis.

Was a problem found?

Verify repair

16

1. Check the air intake system and the crankcase for

air leaks.  Refer to 

Air Intake System and

Crankcase Ventilation System.

2. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 17

17

1. Review all diagnostic procedures within this table.
2. When all procedures have been completed and no

malfunctions have been found, review/inspect the
following:

D

Visual/physical inspection

D

Tech 2 data

D

Freeze Frame data/Failure Records buffer

D

All connections within a suspected circuit
and/or system.

3. If a problem is found, repair as necessary.

Was a problem found?

Verify repair

Go to 

Step 18

18

Perform the procedure in 

Fuel System Pressure Test.

Was the fuel pressure normal?

Contact

Technical

Assistance

Verify repair

 

 

 

 

 

 

 

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