GMC Repair: how, electric fuel pump, pontiac sunbird

Question
HI, I HAVE A 1992 PONTIAC SUNBIRD CONVERTABLE WE BOUGHT IT WITH 62000 ORIGINAL MILES IT LOOKS AND RAN LIKE BRAND NEW OK ITS ONLY GOT 76000 MILES NOW RAN GREAT A WEEK AGO I MEAN 0 - 60 IN 5 SECS ANYWAY IVE PUT A NEW TIMING CHAIN WATER PUMP  AND WIRES O YEAH ITS FUEL INJECTED 4 CYLYNDER ANYWAY IT STARTED ACTING FUNNY LIKE FUEL INJECTER GOING OUT BUT STILL RAN PRETTY GOOD THEN IT JUST WOULDENT START SO WE TOOK IT TO A MECHANIC HE SAID ALL THE COMPRESSION WAS GONE WELL I JUST DROVE IT ABOUT A WEEK BEFORE THAT ANYWAY SOMEONE ELSE SAYS ITS THE FUEL PUMP OR INJECTERS BUT I DONT KNOW SO I CANT FIND THE FUEL PUMP WHERE IS IT AND HOW DOES A CAR WITH THAT GOOD AN ENGINE JUST LOSE ALL THE COMPRESSION OR WHATS WRONG WITH IT ?

Answer
FIRST you need to verify that you have compression on ALL the cylinders. If you have NO compression it is most likely that the timing chain/belt broke.

The electric fuel pump is in the fuel tank.

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.



let me know.


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