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[Stevanju]

  Hi all I recently purchased a w reg omega elite 2.5v6 auto. It has done 125000 miles and has extensive service history and looks well cared for. In the week that i have had her she has failed to start on a number of occasions and the frequency of the problem is increasing. When it happens it turns over but fails to spark. I spoke with seller aand he has no idea as to the cause.  He informed me that the crank sensor was recently replaced. If left for a period of time it tends to start easily although recently this has been getting more difficult.
Apart from this the car drives smoothly and is a pleasure to own so if anybody knows what it may be I would welcome your help.
many thanks
Steve

[Elite Pete]

Hi and welcome to the forum

Try doing the paper clip test oh and if the crank sensor wasn't genuine it wont last 5 minutes

[cem_devecioglu]

cold or warm start problem ?

[Stevanju]

Hi again. The problems seem to occur when it has been used for a while and then left 20 or so minutes. What is the paper clip test? and can a mechanical thicko do it?

[cem_devecioglu]

this will help
 
http://www.omegaowners.com/forum/index.php?topic=90581.msg1155463#msg1155463

[Andy H]

Have a read of the guides in the maintenance section

Omega Owners Forum > Omega Help Area >  Maintenance Guides >  Maintenance Guide Index

The paperclip trick is described here Paperclip Test & Pedal Trick

[Stevanju]

Hi many thanks to all respondents. Car has started perfectly since I posted and I've yet to find a paper clip. Will do tests today. Steve