When all else fails (or if your car is just that shit to start with) try St. Jude. After that you may be on your own.
Also, I had no idea St. Frances was the patron saint of motorists. Quoth wikipedia: In 1925, Pope Pius XI declared her the patron saint of automobile drivers because of a legend that an angel used to light the road before her with a lantern when she traveled, keeping her safe from hazards.
seen the headlights on that angel?