Hi Peter, I have tried the spare key and the same thing happens. All the dash lights and instruments work correctly. When the car does start it is perfect. Problem seems worse when the engine is cold. I have got a small blow in the rear exhaust manifold which sounds worse when the engine is cold (i think the crack must seal slightly as the manifold expands), wondered if that could have an effect.

Definitely no spark but haven't checked whether there is fuel getting through. Car is at my local garage now so will ask them to check the fuel. The flashing immobiliser light on the dash goes out when the ignition is turned on.

I've located a second-hand ECU with the same part no. (£170) and Chrysler in Stoke say they can program it for £90 but cannot guarantee it will work! So if it doesn't work then I will be non the wiser as to whether it is the ECU reprogramming which didn't work, or the original failt not cured. Appreciate your time and help Peter. Cheers Steve.

So you think that as well as no spark the fuel is also cut-off? Do they work in sync. with each other, therefore, no spark = no fuel?

There is usually a power control relay that enable the +12 v feed for the injectors, ignition system and other ancillaries. This relay is contolled by ignition/ECU whilst the actual pulses ( grounding signals ) go diectly fro the ECU to the injectors etc timed by the crank/cam sensors to establish the timing. I hope the garage can induce the faulty condition dto identify the fault. Regards Peter

Two garages looked at the problem and could not solve it. Ended up selling the car on EBAY. I was completely honest about all the problems (and there was a long list of them), a Polish chap bought it and was pleased to bits. I contacted him a few weeks later and he said the car was running lovely and had passed its MOT no problem. He changed the engine relay (£120) and the car fired-up first time. He also changed the LPG filter and it ran fine on the gas. If only I had known....

Hope this may help someone!