Crew driving down the road at 30mph and the engine just stopped running. It will turn over fine but will not start. No engine lights or other lights are on. We pushed it into a parking lot for the night. My plan was to to replace all the relays one at a time(only two kinds of those), Then maybe go thru the fuses. Is there any other thing to do before we have it towed? It has 50K miles on it and we put more fuel in even though it said it had a half tank. It is $200 in this town for a tow...may drag it home. If there any problem with doing that...like to transmission?