Hi, Mike. I changed the ECM, and the engine still cut out, almost instantly, and was as bad to drive as previously. Then I changed the 2 square, blue relays next to the big black indicator relay. It appeared to run a little better, and allowed me to get off the estate, but started jerking more than I was happy to drive. I noticed that the two left hand blue relays of the block of four seemed to get quite hot (1 square one, top row, one smaller one, bottom row. I swapped out the LH smaller (bottom row) blue relay for one off the scrapper. EM light did not come on with all the other dash warning lights when I turned the ignition key to position 2, and the engine would not start. So I swapped that relay for the other scrapper small one, and it started and ran fine for about 10 mins. by which time I was loading it for the trip back to Cumbria. I restarted it, and set off, with it coughing occasionally, and used the 'keep it over 2,500 revs' principle while in town, and it coughed occasionally, then increasingly, so I pulled over, and swapped in one of the original square relays, (top left, felt hot.) It did 65-70mph happily for about 10miles along the A69 before starting to cough, so I pulled over, and swapped out the hottest of the four blue relays. Most of the remaining 40 miles home, it would cough occasionally, mainly while accelerating hard between 2,500 and 3,000 rpm (ironically), or when coming off the overrun and gently back onto the throttle. If I keep my foot on the throttle, it will not pick up, however, if I momentarily release the throttle, then re-apply it, it will click back in, and the EM light will go off until the next time. By this method, I found it easier to get the car home, sometimes doing 5 miles at a time without a cough, over hill and dale (A686). Overall it seems to be improving. It is now running on the last 10 litres of the tankful treated with Redex injector/system cleaner which was put in 10 days ago. Could there be impurities/debris/water in the tank, and would they give these symptoms. Do relays run warm? It doesn't seem to be the relays themselves, rather their positions which make them get hot. Hoping all this history helps with diagnosis. Regards, Andrew.