BMW: bmw e32 engine cuts off, bmw e32, lambda sensor

Question
Having problem with start sorry no start at all when  engine hot.-has to cool down. Changed ECU,lambda sensor no change. Checked fuel line -petrol's flowing fast.Plugs done about 20.000km, clean without deposits.First time it stopped during driving today quite suddenly without warning-just cut off. Starter cranks OK but motor doesn't like to pick up at all any suggestions where to look first?
Regards Jac

Answer
hi my friend. first of all i want to tell you that e32 is some how out of my expertise but i will tell two possible solution.first there are two ECU sensor on your engine i recommend you to change both of them but simultaneously in order to +know which one is not working second may be your fuel pump is not strong enough it cant pump fuel when it becomes hot.please after you did these inform me.good luck