Cadillac Repair: Hard engine start, fuel pump relay, biaritz

Question
I recently bought a beautiful 1981 Eldorado Biaritz with 49,500 miles on the odometer. This will be the first of several questions I have. Even though it has the dreaded 8/6/4 6.0 liter eng. it runs very well.--The problem is if I start it cold it starts immediately. After it is driven and warmed up I can shut it off and restart it in 10 or 15 min. with no problem BUT if it sits for 45 min. or an hour and I try to start the car again,it takes 4 or 5 hits of cranking before it finally catches,chokes and stumbles  then smoothes out. Whats your thoughts?

Answer
Fuel pump test:

1. Get yourself a helper.

2. remove the gas cap.

3. have one person listen in the gas tank at the gas cap opening.

4. have the other person turn the ignition switch to the ON position ONLY so as the dash lights come on. Do NOT attempt to start the engine.

5. As soon as the ignition key is turned to the ON position, The person at the gas tank should hear the fuel pump run for TWO SECONDS and then it should STOP.

6. Does it ?.


If you do NOT hear it run, in most cases the fault is the fuel pump relay or the fuel pump..