Question about 1993 Pontiac Grand Prix
Fuel Pump Shut off switch
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Posted on Jan 02, 2017
disconnect wiring to pump. install new fuse for the pump and turn over ignition. the car wont start because the fuel pump wiring is diconnected. check the fuse to the fuel pump, if the fuse did not blow when the pump is disconnected it is a faulty fuel pump. I read this somewhere and a garage is up to 850 dollars in parts and labor only to offer me more parts and labor not relevent to my problem. I am towing it home and running this test my self.
Posted on Apr 10, 2009
check the pcm ignition fuse and the fuel pump injectors fuse.if all is good.your pcm could be the problem. the pcm it controls fuel pump.first have car hooked up to scanner to look for pcm failure code.
Posted on Nov 25, 2009
There is a fuse in the fuel pump circuit. It is in the fuse box either under the dash on the left side or under the hood near the battery. The map of the fuses is under the cover of the fuse box. Unfortunately the usual problem with these cars is a dead fuel pump. It is inside the fuel tank and is a long and difficult fix. First you have to remove the tank from the car. Then remove the pump from the tank, replace it and put it back together. It is a lot bigger pain than it sounds like. Good Luck.
Posted on Mar 19, 2010
SOURCE: where is the fuel pump
GM doesn't use a fuel pump shut off switch, the safety system works like this, fuel pump is turned off if the engine oil pressure goes to zero with the key in the run position. Ford uses a shut off switch that is activated by an impact exceeding 3 G's (3X the force of gravity), it is called the fuel pump shut off inertia switch.
Posted on Aug 24, 2011
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