just had a similar situation with my 90 lx 5.0. after driving it all day in traffic. from about 9am till 1pm, I got to my destination only to have it not start. thought it was the fuel pump since it's the original and has 180 thou on it, stayed overnight, (luckily I was at a hotel) had the car towed home and after dumping $90 for the tow, the car started right up like nothing happened. Gonna swap out the original fuel pump for the 190 lph anyway, but a good rule is to carry a spare module during the warmer months. just in case.