Ok, so the problem was.... 94 voyage (3 litre) , driving home, speedo stuck, car slowed down, then would not start. Does not do the engine codes, so we checked the computer and replaced it (we had one spare), still same problem, starter turns over does not spark. So now we are thinking distributor, is there any good tests that we can try before i go and get one? Ive also checked the fuses and they all seem fine. thanks