GMC Repair: 93 gmc safari 4.3 litre vortec v6, oil pressure switch, electric fuel pump


Question
engine stall  intermittent ,and would not start next morning. replaced el fuel pump with carter brand pump,replaced f.p. relay, fuel filter .does not seem to be getting fire to pump but am getting fire to relay replaced oil pressure switch ,did not help. does it have engine reset switch? please help.

Answer
1. get yourself a helper.
2. remove the gas cap.
3. listen at the gas cap.
4. have your helper turn the ignition switch to the ON
  position ONLY. Do NOT try and start the engine.
5. as soon as the ignition switch is turned to the ON
  position, You should hear the electric fuel pump in the
  fuel tank run for TWO SECONDS and then STOP.

DOES IT ?.


I can e-mail you an electrical schematic of how the fuel pump circuit is wired and IF you know how to use a volt meter and can read the electrical schematic, You can easily diagnose and fix your problem.


You will need to contact me at:

onlineautohelp@msn.com

in order to obtain the electrical schematics and test procedures as this website does NOT allow the e-mailing of pictures.

PLEASE include ALL of this information pertaining to your vehicle and this question when you contact me at my e-mail address.


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