My son has a 93 lx came in this morning said car had run out of gas. We put about 4 gallons in and now when we turn the key the pump will not prime no sound coming from it at all car cranks strong but seems like no fuel . opened the little fuel line valve while he cranked and got no fuel at all. I know there is a relay under the seat of the 91 but where is it in the 93? help please.