Opel Frontera UE. Manual - part 367

 

  Index      Opel     Opel Frontera UE - service repair manual 1999-2001 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  365  366  367  368   ..

 

 

Opel Frontera UE. Manual - part 367

 

 

6E2–274

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Hesitation, Sag, Stumble Symptom

 

Step

Action

Value(s)

Yes

No

1

DEFINITION:
Momentary lack of response as the accelerator is
pushed down.  Can occur at any vehicle speed.  Usually
most pronounced when first trying to make the vehicle
move, as from a stop sign.  May cause the engine to stall
if severe enough.

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

1. Check the fuel control heated oxygen sensors

(HO2S, B1S1 and B2S1).  The fuel control heated
oxygen sensors (HO2S) should respond quickly to
different throttle positions.  If they don’t, check them
for silicon or other contaminants from fuel or use of
improper RTV sealant.  The sensors may have a
white powdery coating.

Silicon contamination causes a high but false
HO2S signal voltage (rich exhaust indication).
The PCM will then reduce the amount of fuel
delivered to the engine, causing a severe
driveability problem.  For more information, refer
to 

Powertrain Control Module (PCM) and Sensors.

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

Was a problem found?

Verify repair

Go to 

Step  5

5

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 6

6

Observe the TP angle display on the Tech 2 while
slowly increasing throttle pedal.

Does the TP angle display steadily increase from 0% at
closed throttle to 100% at WOT?

Go to 

Step 7

Go to 

Step 18

7

Monitor 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 8

Go to 

Step 9

8

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

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

6E2–275

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Hesitation, Sag, Stumble Symptom

  (Cont'd)

Step

No

Yes

Value(s)

Action

10

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 11

11

1. Check for a loose ignition coil ground.

Refer to 

Electronic Ignition System.

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

Was a problem found?

Verify repair

Go to 

Step 12

12

1. Check the 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 13

13

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.

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

Was a problem found?

Verify repair

Go to 

Step 14

14

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 15

15

1. Check the MAF sensor connections.
2. If a problem is found, replace the faulty terminals as

necessary.  Refer to 

Electrical Diagnosis for wiring

repair procedures.

Was a problem found?

Verify repair

Go to 

Step 16

16

1. Visually/physically check vacuum hoses for splits,

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

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. 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

6E2–276

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Default Matrix Table

Service Procedure Default Strategy

A referral strategy has been established to assist the
technician with additional information when the cause of
the failure cannot be determined.  If no problem is found
after performing diagnostics, then refer to the default
matrix table for further diagnostic information.

Default Matrix Table

Strategy Based Diagnostic Charts

Initial Diagnosis

Default Section(s)

On-Board Diagnostic (OBD) System
Check

Vehicle does not enter diagnostics.

Chassis Electrical

On-Board Diagnostic (OBD) System
Check

Vehicle enters diagnostics and
communicates with the Tech 2.  MIL is
“ON” in diagnostics.  Engine does not
start and run.

Ignition System Check

On-Board Diagnostic (OBD) System
Check

Engine starts and runs, no PCM codes
set.  Customer complains of vibration.

On-Board Diagnostic (OBD) System
Check

Engine starts and runs, no PCM codes
set.  Customer complains of harsh or
soft shift, poor performance, delayed or
no engagement into drive or reverse,
transmission fluid leak, transmission
noise or vibration, or improper TCC
operation.

Automatic Transmission

PCM Power and Ground Check

On-Board Diagnostic (OBD) System
Check.

Chassis Electrical

PCM Power and Ground Check

On-Board Diagnostic (OBD) System
Check. PCM power and ground circuits
OK. Data link voltage incorrect.

Chassis Electrical

On-Board Diagnostic (OBD) System
Check

Engine starts and runs, no PCM codes
set.  Customer complains of harsh or
soft shift, poor performance, delayed or
no engagement into drive or reverse,
transmission fluid leak, transmission
noise or vibration, or improper TCC
operation.

Automatic Transmission

Symptoms

Initial Diagnosis

Default Section(s)

Intermittents

1. On-board diagnostic (OBD)

system check.

2. Careful visual/physical inspections.

Chassis Electrical

Hard Starts

1. OBD system check.
2. Sensors (ECT, MAP, MAF, TP) ;

MAP output chart.

3. Fuel system electrical test, fuel

system diagnosis.

4. Ignition system.
5. IAC system check.

Engine Mechanical, Ignition
System Check, Exhaust System
Diagnosis

Surges and/or Chuggles

1. OBD system check.
2. Heated oxygen sensors.
3. Fuel system diagnosis.
4. Ignition system.

Calibration ID “Broadcast”
/Service Bulletins, Ignition
System Check, Generator
Output, Exhaust System
Diagnosis, 4L30-E System Test

6E2–277

6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Symptoms

Initial Diagnosis

Default Section(s)

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. EVAP emission canister purge

valve.

7. 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. EVAP emission canister purge

valve check.

4. Ignition system.
5. IAC operation.
6. 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.

 

 

 

 

 

 

 

Content   ..  365  366  367  368   ..