Question about 1998 Mercury Grand Marquis

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Fuel pump switch overly sensitive is there a fix

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You can bypass the inertia switch or replace it. Bypassing the switch is NOT recommended since it is a safety switch to cut the fuel pump off in case of a rollover type accident.

Posted on Nov 06, 2014


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Where is the emergency fuel shut off switch located on a 1993 chevy suburban?

There is no emergency fuel shut off switch on your vehicle , ford vehicles have one , called inertia fuel shut off .
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Some cars have an inertial shut-off switch for the electric fuel pump. That switch is sensitive to impact and is designed to shut off the fuel pump in case of collision.

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Most vehicles are equipped with what is called a fuel power inertia switch. It is a basic component that shuts down the fuel system during an accident to prevent fuel from being an factor during sensitive times. You may have to find and flip or replace this switch. I do not know the location of it on this particular model off hand, but if you consult your service manual you should be able to locate it quickly.

NOTE: on most vehicle it is located under the dash near the glove box. On some near the fuse box. On cars it is commonly in the trunk.

Thanks for using FixYa, if this solution does not work please feel free to come back and try again.

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If you can, check the fuel pump pressure. The Votec engines are real sensitive to the right amount fuel pressure. If the pump is getting weak, it will cause the symptoms you are describing.

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Its called a Main Fuel Pump Relay.. It controls Fuel Pump, Starter, Ignition.. and Like 12 things.. Get one And I guarantee that'll fix it.. It looks like a cell phone on the upper inside of the dash.. about 52 Bucks from the dealer.. Try it

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