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[Hollybob]

I've got a 2001 Omega, a 2.4L petrol automatic. Tried to start the car to leave office about 3 weeks ago and, despite having had no previous problems, it was turning and not firing. Called out Green Flag and after appearing to tighten something in the engine while I was in the driving seat he asked me to start it....and it started first time.

He said it would seem I'd got some air in the fuel pump but it should now be ok.

About a week or so later the same thing happened again.  Called them out again but this time, when he'd arrived, I went out and it started first time..!  But he said not to worry he would put the diagnostic machine on and just make sure everything was ok.  No fault codes at all which led him to say it was 'one of those things'. 

Two and a bit weeks on, with no further problems in between, its happened again. I'm not going to use another call out....but I'm actually thinking of changing cars and would therefore prefer not to shell out a lot of money in repairs.....but I'm stuck as it won't start now.

Any suggestions or thoughts anyone...??

[4x4]

Being a 2.4 its going to very hard to say what it is,is this a 4 or 6 cylinder engine as never fitted to an omega 

[05omegav6]

If it's a v6, suspect the crank sensor

[Hollybob]

Hi Taxi Al.....a mate of mine mentioned the camshaft sensor.....is that the same thing.....?

IS it something that is just intermittent or would it need looking at.

I just thought that the fact it started when the Green Flag bloke turned up....and made me look a bit of a dick for calling him I wondered whether that would keep happening....?

[TheBoy]

Can you confirm engine?

[05omegav6]

Hi Taxi Al.....a mate of mine mentioned the camshaft sensor.....is that the same thing.....?

IS it something that is just intermittent or would it need looking at.

I just thought that the fact it started when the Green Flag bloke turned up....and made me look a bit of a dick for calling him I wondered whether that would keep happening....?

V6 suffers from intermittent starting with a failing/failed crank sensor, to the point where they won't run at all.
2.0/2.2 suffer from failing cam sensors, which only make it harder to start, but will allow eventual starting.

Given the Omega B was never fitted with a 2.4 lump, what engine exactly is fitted to your car?

[Hollybob]

Apologies....its a 2.6 not 2.4. CDX V6. Jan 2002.

If its the sensor what do you think it would cost to repair...?  Does it need replacing or is it the sensor just getting dirty...?

[zirk]

New Sensor required, get a proper GM one, 5 min job once you get under the Car.

[Hollybob]

What am I looking at cost wise....?   I'd have to get someone to do it as well....

[zirk]

Cant remeber what they cost from VX, but if you get your hands on one, Im not far from you, so can lend a hand, or fit it for some beer tokens.   

[05omegav6]

Between £70-85

Only buy one from a Vauxhall dealer... anything bought online or from elsewhere will be a waste of time and cash

[Hollybob]

Thanks very much for your help and advice.....and especially you Zirk.  That's really good of you to offer to help out.  I actually spoke to a guy this morning (before I saw your post tonight) and hopefully he's going to sort it out tomorrow.

Only problem is it still won't start and its parked outside my house.  Is it the sort of thing that can be fitted where its parked or will it need towing...?

[05omegav6]

No need to tow... can almost be done without jacking

[zirk]

No need to tow... can almost be done without jacking

God you must be thin Al or have some extra elbow joints in your arms 

As Al meant to say, Jack up near side front (H&S moment, support car with Axle Stands or something) CS is located near the Oil Filter, one bolt holding it in, when the new one is fitted, cable tie the cable away from the Exhaust as much as possible, follow the Brake pipes going down.

[05omegav6]

No need to tow... can almost be done without jacking

God you must be thin Al or have some extra elbow joints in your arms 

As Al meant to say, Jack up near side front (H&S moment, support car with Axle Stands or something) CS is located near the Oil Filter, one bolt holding it in, when the new one is fitted, cable tie the cable away from the Exhaust as much as possible, follow the Brake pipes going down.

I did say Almost , a decent curb gives enough space to crawl underneath, but on a lift it becomes a two minute job