I bought an eprom for my Omega 2.5td auto. If anyone is interested in purchasing one I can recommend this mapping.
I got it on Ebay for 21GBP plus two quid for a chip socket, it was an auction so I was luck in more ways than one.
I had lots of communication with the young guy and he's quick reliable etc etc.
The auto box(ar25) is already complaining with the extra power but I swear that the engine smokes less than before. Unless i"m going that much faster that I dont see it!
I can pass any details on if anyone is interested, including how to swap the chip etc.
Will have fuel figures soon.
Rgds
Yes me please

I already have a replacement chip but it's sitting in the cupboard at the moment, took it out and put the original back.
The car goes fantastic but for reasons I have stated before, it gives me....
Less mpg
More smoke
Stuttering when I lift off the accelerator at speeds of around 35mph and around 50mph.
Would be interested if your chip works perfectly, and gives you more mpg, and hopefully less smoke, than mine did anyway

Mick
