Cadillac Repair: Long starts when warm, cadillac eldorado, fuel pump relay

Question
Hi, Im having problems starting my 1996 cadillac eldorado (etc)only when it sits idle for over 15 minutes. first start of the day it starts on a dime but when it warms up and i run into the store or something for more than 15 minutes , I turn the ignition and it turns and turns until 1 I full throttle it turning off the injectors or 2 it catches on its own.please help that's the only problem i'm having other than oil consumption.

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..



let me know.



also check for fuel pressure and spark to the spark plugs when this fault is occurring.