running on 3 cylinders - diagnostic results

[mark312]

Hi, I'm new to this forum, and hoping someone can help us out.

My daughters Y reg 1.2 Corsa B went through some large puddles last week after really heavy rainfall, and later on in the journey she pulled over at 1 in the morning on the M6, because the oil light came on, car didn't sound right and was losing power. Guess who was the one called out because she has no breakdown cover? Anyway, my immediate thoughts were oil, checked ok, then water in the electrics - not much you can do about that one at 1.30 in the morning.....

Next morning it seemed better, thought it may have dried out, but again the rough running returned later that day, although it is nowhere near as bad as the time it broke down.

So, we've bought an Opcon diagnostic scanner off ebay, cleared four fault codes, but the block tests say it's running on three cylinders. If I blip the throttle, it briefly shows 4 cylinders then reverts to three again.

What I don't know is why, and I was wondering if anyone here would be able to tell from the report if there is anything obvious we should check out. The two strange things are the battery voltage showing 0.0 V, and vehicle speed 161 KM/h - stationary whilst this test ran....

I have listed below the report saved after running the tests.

Any help gratefully received!
Mark

OP-COM 100219a - PC based diagnostic tool

Date and time> 26/12/2011. 12:5453

Workshop information:

hkj


Selected model> 2000 (Y) Corsa-B Engine X 12 XE

Control Unit:

Keyword #1: EF
Keyword #2: 8F

Normal timing parameter set.

VIN: W0L0XCF0814126773
vehicleManufacturerECUHardwareNumber 09115112 BZ
systemSupplierECUHardwareNumber: BOS01120261206074
systemSupplierECUSoftwareNumber: 1037360752
systemSupplierECUSoftwareVersionNumber: 0C84
exhaustRegulationOrTypeApprovalNumber: B01007
systemNameOrEngineType:Z12XE
RepairShopCodeOrTesterSerialNumber:Not programmed
ProgrammingDate:20001215

Identifier: 1211

CalibrationDate: 05120804
CalibrationEquipmentSoftwareNumber: 0522
ECUInstallationDate: S 43000100
VehicleManufacturerSpecific: 0261206074

Measuring blocks information:

Battery Voltage 0.0 V
Immobiliser Signal Not Received
Immobiliser Inactive
Engine Speed 600 RPM
Fuel Pump Relay Inactive 12V
TPS Signal (Throttle Position Sensor) 4.66 V
Throttle Valve Angle 0 °
Idle Switch Open12V
Simulated Full Load Switch Inactive
Mass Air Flow Sensor 0.00 V
Coolant Temperature 214 °C
Coolant Temperature 0.00 V
Intake Air Temperature 78 °C
Intake Air Temperature 1.29 V
Engine Type 3 Cylinder
Transmission Coding Manual Transmission
Park/Neutral Switch R-D-3-2-112V
A/C Information Switch Active 12V
A/C Compressor Switch (Air Conditioning) Active 12V
Hall Sensor Inactive
Ignition Coil 1 Spark
Ignition Coil 2 Spark
Ignition Coil 3 Spark
Ignition Coil 4 Spark
Knock Signal Inactive
Knock Retard 120 °CA
EGR Valve (Exhaust-Gas Recirculation) Inactive
EGR Pulse Ratio (Exhaust Gas Recirculation) 0%
EGR Position Feedback (Exhaust Gas Recirculation) 1.99 V
Fuel Tank Ventilation Valve 0%
O2 Sensor 39 mV
O2 Sensor Loop Open
Air/Fuel Ratio Lean
O2 Loop Integrator 4 Steps
O2-Loop BLM Idle (Block Learn Map) 209 Steps
O2-Loop BLM Partial Load (Block Learn Map) 12 Steps
Desired Idle Air 0 kg/h
Actual Value Idle Air 0 kg/h
Desired Engine Idle Speed 10 RPM
Engine Load Signal 0.8 ms
TPS Load Signal (Throttle Position Sensor) 0 Steps
Torque Control 38%
Torque Control Active
A/C Relay (Air Conditioning) Inactive
Vehicle Speed Pulse Not Received
Vehicle Speed 161 km/h
Telltale (Check Light) Off 12V
Engine Speed Pulse Active
Calculated Air Flow 2.1 kg/h
Injection Pulse 0.0 ms
Spark Angle before TDC (Top Dead Centre) 72 °CA