I have a 1997 ford crown victoria that will not run. I had a lower ball joint break on the car and had to get it towed home I replaced it and when I went to start the car it would not start. It acts like it wants to but it won't. I have reset the fuel cut off switch and even unhooked the battery to let the system reset but still nothing. I even hooked a code reader to it and it says it cannot communicate with the computer in the car, so is the computer in the car bad and if so how to check it and what would cause it to go bad all of a sudden?