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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 08 September 2025, 16:16:27 »
I have a leak in the exhaust manifold and I read somewhere it can produce knock. Does this makes sense?
- 11 September 2025, 15:55:36
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 30 August 2025, 00:55:36 »Is it actually misfiring?Worst!
Hard start, knock, loss of power, burned smell.
And I reassembled the engine. I'm cooked
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 18 August 2025, 11:46:24 »Err, don't take any notice of what the ECU says about the HT side. It has no way of knowing. At best, all it could do would be measure current on the LT side, but in these ECUs, it doesn't even do that.
Go back to basics.
You are absolutely spot on, as soon as the motor started, ecu now says 6 cylinder! Although 5+2 still displays the same
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 15 August 2025, 18:54:26 »Which leads did you swap?Swap a lead over, does the fault move?
It stays the same 5 2, I'm afraid this going to be a pain
3 and 6 might not reach 2/5 and like wise 2/5 might not reach 1/4.
If you don't know when they were last replaced, that's probably your best starting point..they do degrade over time.
I'm afraid is not about the leads at all.
I.e. I removed the 5 and put the 3 in its place instead, leaving the 3 null and ecu presented the same readings 5+2
This is something else don't know what tho
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 15 August 2025, 10:53:27 »
Not the leads nor sparkplugs. Could it be the connector?the loom?
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 14 August 2025, 17:27:10 »Swap a lead over, does the fault move?
It stays the same 5 2, I'm afraid this going to be a pain
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 13 August 2025, 16:19:43 »Dis pack failure?
It's definitely a 'thing'... They fail over time and they really don't like water.
New dis module installed and the same 2 and 5 cylinders.
Could it be the leads?
Regards
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 27 July 2025, 19:08:31 »What's the Delphi part number? Might it be SS10809?
In that case it is an incorrect part. The resistance is incorrect @ 0.59kΩ. The original Bosch part has a resistance of 0.86kΩ.
The correct GM part # for your car should be 90540743 which is Bosch part 0-261-210-131. A factory original sensor will have both those numbers on it. Sometimes GM parts also have a parallel factory production part number, in this case 90494182. Cadillac and Saab use the factory production part number as the spare part number, but it's still the same Bosch 0-261-210-131. This sensor has an oval sided connector.
So have a look at the sensor you removed in the first place, if you still have it? I expect you'll see a Bosch logo and 0-261-210-131 on it.
Be aware that Bosch no longer manufacture these sensors in Germany. They are now made in Slovenia, if they're still made at all. Even the GM special order ones that were available until a few years ago are the Slovenia parts.
Hi, the one I took is a OEM Siemens GM part 90492061 made in france. Is not the same is it?
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 27 July 2025, 10:48:35 »Simple test for crank sensor is with diagnostic interface, look at live data for engine rpm signal. Should be 300ish rpm when cranking over.
It's 0rpm
returning this delphi one. Can't recommend
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Omega General Help / Re: x25xe wont start on my 1998 omega b
« on: 27 July 2025, 00:22:45 »
well new dis pack on the way.
never guessd this would be a money pit
never guessd this would be a money pit
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Omega General Help / x25xe wont start on my 1998 omega b
« on: 26 July 2025, 22:32:30 »
Hi,
Im almost certain I have to change the cranck sensor, but recently when I plugged the computer to the car I saw the strangest thing:
Engine Type,4 Cylinder
Ignition Coil Cyl. 1+4 (Cylinder),Load
Ignition Coil Cyl. 2+5,Load
Ignition Coil Cyl. 3+6 (Cylinder),Load
Is this a thing?
I cleard all the fault codes and the reason no crack sensor fault is on, is cos I've tried an inferior one but with no results I have to aim for the better ones
Here is the diagnose
Im almost certain I have to change the cranck sensor, but recently when I plugged the computer to the car I saw the strangest thing:
Engine Type,4 Cylinder
Ignition Coil Cyl. 1+4 (Cylinder),Load
Ignition Coil Cyl. 2+5,Load
Ignition Coil Cyl. 3+6 (Cylinder),Load
Is this a thing?
I cleard all the fault codes and the reason no crack sensor fault is on, is cos I've tried an inferior one but with no results I have to aim for the better ones
Here is the diagnose
Quote
VAUX-COM 120309a - PC based diagnostic tool
Date and time>,26/07/2025. 21:3043
Workshop information:
Please add your workshop
name in the settings window
Selected model>,1998 (W),Omega-B,Engine,X 25 XE
Control Unit:
KW82 protocol initialized.
ECU ID= HH,90492382,0261203588,1267358989,03,
Measuring blocks information:
Identifier,0D
Battery Voltage,13.0 V
Immobiliser Signal,Received
Immobiliser,Active
TPS Signal (Throttle Position Sensor),0.57 V
Simulated Idle Position,Active
Simulated Full Load Switch,Inactive
Mass Air Flow Sensor,0.00 V
Mass Air Flow Sensor,0 kg/h
Coolant Temperature,3.27 V
Coolant Temperature,26 °C
Intake Air Temperature,3.14 V
Intake Air Temperature,29 °C
Engine Type,4 Cylinder
Transmission Coding,Manual Transmission
Park/Neutral Switch,P - N 0V
A/C Information Switch (Air Conditioning),Inactive 0V
A/C Compressor Switch (Air Conditioning),Inactive 0V
Telltale (Check Light),On 0V
Fuel Pump Relay,Inactive 12V
Spark Angle before TDC (Top Dead Centre),0 °CA
Ignition Coil Cyl. 1+4 (Cylinder),Load
Ignition Coil Cyl. 2+5,Load
Ignition Coil Cyl. 3+6 (Cylinder),Load
Knock Signal,Inactive
Knock Retard,0 °CA
Secondary Air Pump Relay,Active 0V
EGR Valve (Exhaust-Gas Recirculation),Inactive
EGR Position Feedback (Exhaust Gas Recirculation),0.00 V
Fuel Tank Ventilation Valve,0 %
O2 Sensor 1,1205 mV
O2 Sensor 2,1244 mV
O2 Sensor Loop 1,Open
O2 Sensor Loop 2,Open
Air/Fuel Ratio 1,Lean
Air/Fuel Ratio 2,Lean
O2-Loop 1 Integrator,255 Steps
O2-Loop 2 Integrator,255
O2-Loop 1 BLM Idle (Block Learn Map),255 Steps
O2-Loop 2 BLM Idle (Block Learn Map),255 Steps
O2-Loop 1 BLM Partial Load (Block Learn Map),0 Steps
O2-Loop 2 BLM Partial Load(Block Learn Map),0 Steps
Hall Sensor,Inactive
Engine Speed Pulse,Inactive
Engine Speed,0 RPM
Idle Air Control,0 Steps
IAC Integrator (Idle Air Control),8 Steps
IAC Adaptation Slope (Idle Air Control),255 Steps
IAC Block Learn (Idle Air Control),8 Steps
Desired Idle Air,0 kg/h
Actual Value Idle Air,0 kg/h
Desired Engine Idle Speed,2470 RPM
Injection Pulse,95.2 ms
Engine Load Signal,0.0 ms
TPS Load Signal (Throttle Position Sensor),0 %
Vehicle Speed Pulse,Not Received 12V
Vehicle Speed,0 km/h
Intake Manifold Valve 1,Inactive 12V
Intake Manifold Valve 2,Inactive 12V
Torque Control,Inactive
A/C Cutoff Relay (Air Conditioning),Inactive 12V
Diagnostic Request,Inactive 5V
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