Opel Frontera UE. Manual - part 1548

 

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Opel Frontera UE. Manual - part 1548

 

 

6E–407

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Dieseling, Run-On Symptom

 

Step

Action

Value(s)

Yes

No

1

DEFINITION:
Engine continues to run after key is turned “OFF,” but
runs very rough.  If engine runs smooth, check ignition
switch and adjustment.

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/

Physical

Check

4

1. Check for a short between B+ and any of the ignition

feed circuits.

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

Was a problem found?

Verify repair

Go to 

Step 5

5

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 butter

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

SECTION

6E–408

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Backfire Symptom

 

Step

Action

Value(s)

Yes

No

1

DEFINITION:
Fuel ignites in the intake manifold, or in the exhaust
system, making a loud popping noise.

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/

Physical

Check

4

1. Check for proper ignition voltage coil output with

spark tester J 26792 (ST-125).  Refer to 

Electric

Ignition System for procedure.

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

Was a problem found?

Verify repair

Go to 

Step 5

5

1. Remove spark plugs and 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. Refer to 

DTC P0172 to determine the

cause of a rich condition or 

Engine Mechanical for an oil

fouling condition.

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

Was a problem found?

Verify repair

Go to 

Step 6

6

1. Visually/physically inspect the ignition coils for

cracks.

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

Was a problem found?

Verify repair

Go to 

Step 7

7

1. Check for an intermittent ignition system

malfunction:

D

Intermittent CKP 58X signal.

D

Intermittent ignition feed circuit or sensor
ground circuit to the crankshaft position
sensor.

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

Was a problem found?

Verify repair

Go to 

Step 8

8

1. Check the fuel pressure.  Refer to 

Fuel System

Pressure Test.

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

Was a problem found?

Verify repair

Go to 

Step 9

SECTION

6E–409

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Backfire Symptom

  (Cont'd)

Step

No

Yes

Value(s)

Action

9

1. Check for the following engine mechanical

conditions.

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

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

Was a problem found?

Verify repair

Go to 

Step 10

10

1. Check the intake and exhaust manifold(s) for

casting flash.  Refer to 

Engine Mechanical.

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

Was a problem found?

Verify repair

Go to 

Step 11

11

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 butter

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

SECTION

6E–410

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Cuts Out, Misses Symptom

 

Step

Action

Value(s)

Yes

No

1

DEFINITION:
Steady pulsation or jerking that follows engine speed;
usually more pronounced as engine load increases.

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?

Go to 

Step 14

Go to 

Step 3

3

Was a visual/physical check performed?

Go to 

Step 4

Go to 

Visual/

Physical

Check

4

Was the “Electric Throttle Control (ETC) System
Check” performed?

Go to 

Step 5

Go to 

ETC

System

Check

5

1. Check the PCM grounds for clearness, tightness

and proper routing.  Refer to the PCM wiring
diagrams in 

Electrical Diagnosis.

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

Was a problem found?

Verify repair

Go to 

Step  6

6

Observe the long term fuel trim on the Tech 2.

Is the long term fuel trim significantly in the negative
range (rich condition)?

Go to 

Step 7

Go to 

Step 8

7

1. Check items that can cause the engine to run rich.

Refer to 

Diagnostic Aids in DTC P0172 Diagnostic

Support.

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

Was a problem found?

Verify repair

Go to 

Step 10

8

Is the long term fuel trim significantly in the positive
range (lean condition)?

Go to 

Step 9

Go to 

Step 10

9

1. Check items that can cause the engine to run lean.

Refer to 

Diagnostic Aids in DTC P0171 Diagnostic

Support.

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

Was a problem found?

Verify repair

Go to 

Step 10

10

1. Check for incorrect idle speed.  Ensure that the

following conditions are present:

D

The engine is fully warm.

D

The accessories are “off”.

2. Using a Tech 2, monitor the Engine Speed.

Is the Engine Speed within the specified values?

Desired Idle

Speed

Go to 

Step 12

Go to 

Step 11

SECTION

 

 

 

 

 

 

 

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