Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: iansoutham on 15 December 2022, 08:14:20
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Well, Omega is officially sulking at being used in the cold.
Went to it this morning, cranked multiple times and would not start. Either no fuel or no ignition. Battery started to drain so stopped. Locked and disarmed car again, started straight up.
Left it running to de-ice and warm up, all fine. 2 miles into drive to work with electrics on, suddenly dash lights as engine had cut out with no noticeable warning. Dropped it into neutral @ 20mph, turned the key and fired straight back up, back into Drive and all electrics off except headlamps and heater, all fine into work.
It must know it is going next year…..
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You shouldn’t have told it😂
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You shouldn’t have told it😂
I didn’t, that is the worrying thing….
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I'm reading that and thinking 2 obvious posibilities - crank sensor or fuel relay (just because its Vauxhall).
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I'm reading that and thinking 2 obvious posibilities - crank sensor or fuel relay (just because its Vauxhall).
Unlikely crank sensor as it restarted almost straight away whilst still rolling. Had one of them go before on my Cavalier with that engine and the 1st time it took about 5 minutes to cool down before working again. Did think fuel pump relay as it worked after locking and unlocking the car (like immobiliser not cutting out).
Will drop test battery this evening, then recharge and rest again tomorrow (both times off the car) jus to rule that out as have had a battery go open circuit and run on the alternator before.
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When my crank sensor started to fail, it would cut out and then restart straight away, so I wouldnt rule it out.
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Does the 2.0 have the same cam position sensor issues that the 2.2 has?
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Had very similar symptoms earlier this year on my 2.6. Initially thought the crank sensor, but a replacement didn't cure it. Symptoms worsened, with intermittant cutting out whilst driving, then immediately firing again due to the engine still turning, until the dash lights started lighting up like a Christmas tree. Fault was diagnosed as a faulty engine ECU, and after a new replacement was fitted and programmed, the car has never run better.
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I would agree that it most likely the Crank sensor. I had very similar problems with both my 2.2 estate and earlier 2.0 estate and each time a replacement cam sensor cured all issues. Just make sure it is a proper OEM quality sensor.
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I meant cam sensor, not Crank sensor, sorry.
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Cam sensors, have spares…
Well, definitely not battery as thoroughly charged and tested off the car. Did suspect it could have been as have had one go open circuit on me whilst driving and the car was running on the alternator. Too much juice, not enough output and it cut out on me. Not the case in this instance. Did 20 miles in it last night in traffic and not a peep out of it.
Might jus tube the cold getting to something???
Will be getting parked up this weekend and the battery disconnecting until New Year as sorting out some other cars that I need to sell off (anyone want a 1992 4wd Sierra Sapphire with low miles and full MOT after full underside rebuild?)
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Ignore my post. I assumed V6. ::)
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The cam sensors seem to fail randomly, often in the middle of a journey. The car will always start again immediately and carry on to the next failure. Easy to change on the 2.2 and 2.0.
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Quick question, failing like that on the cam sensor, would there be a fault code stored? No lights stayed on the dash afterwards and a Tech2 read shows no fault in any systems.
I have a spare cam sensor so if it goes again, can always swap it out
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Usually there is, although I can't remember what it is but I don't remember a dash light coming on. It was a fair time ago and my memory is not as good as it was.
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On a 2.2 16V with a failing cam sensor you would likely see random fault codes supposedly related to the autobox. Nothing actually specific to the cam sensor.
I can't remember about the 2.0L, however I would still go for the cam sensor. The four pot crank sensors seem to be pretty bulletproof. Just make sure the replacement cam sensor is correct for the car and it's ECU.