Cadillac Repair: car wont start, fuel pump relay, carberator

Question
my car will crank up and die out a couple seconds later only if the injectors are not plugged into the carberator, when they are plugged in it won't even start.

Answer
YEAR-MAKE-MODEL ?.

do the injectors spray fuel when you have them hooked up when trying to start the car ?.


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 ?.

7. If it does NOT run for the 2 seconds the fault is either the fuel pump. fuel pump relay