I recently broke down and got the RAC to come out and get me going again which they did nicely and he traced the problem to the battery. I got a new battery and everything was fine for about a month but today I broke down again, I was about to pull out of a junction and the engine just cut out and refused to start again. As I had a new battery I was pretty sure that it wasn't the problem.
I called out the RAC again and he spent 2 hours tracing the problem. Initially after lots of electrical testing he traced it to a relay in front of the battery (there is a cover in front of the battery, pop that off and there are 3 poking out). It seemed the contact was dodgy. How he explained it was the electric coil magnetises causing a lever to contact it which allows a circuit to form allowing current to flow to start the engine. This lever was getting stuck so the engine wouldn't start or the opposite and refusing to stick after the engine started which caused the engine to stop.
He managed to get the engine turning over and he advised me to replace the relay and we thought that was the end of the problem but then the engine cut out again and no matter what he tried it wouldn't start again. He tested some more and he thinks the ECU is faulty which in turn has burnt out the relay because it is drawing to much current.
Has anyone had similar problems? I am hoping it is just a case of buying another one and fitting it in and it will work, it doesn't need any more programming by a garage or anything?
My car is a 146 2.0 Ti, 2000 X reg. I googled the ECU part number 0261204946 which I think is a Bosch M 1.5.5
I am having trouble finding a part as google is taking me to pages with lots of tech specs and I am also not sure if I should go for a brand new one or get a second hand one. I looked on ebay but the part numbers don't match.
I am having so many problems with this car it is infuriating, when it rains it pours eh