Got a strange one with my X Reg focus that is doing my head in. At times when driving the car shudders, looses power and then cuts out and will not start. After it has cooled down a bit, it starts first time, goes for a few miles and then starts all over again, shudder, power loss, stop. Temp gauge reads normal so its not overheating. Took me 8 hours to coax it back from the New Forset 2 weeks ago. Has anybody got any ideas what the problem is and how I can repair it. Phil.