Question about 1989 Mercury Cougar

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1989 Cougar, XR7, Supercharged-- I have zero fuel pressure. Is it most likely a relay, a fuse, or the fuel pump?

19879 Cougar XR7-Supercharged, 3.8, five speed car. I put a pressure guage on the fuel line, and cranked the engine. I have Zero pressure. Not even a drop. I cannot hear the pump either. It has plenty of fuel. Car has been sitting for two years. My fuses look good.

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  • 5,623 Answers

This sounds like the Inertia switch is tripped. This switch is either in the trunk or behind one of the kick panels. This is a resettable switch that cuts power to the fuelpump in a collision. Often a bump of the correct frequency will trip this.

You also have a fuelpump relay in one of the Powerboxes. The sequence is such that power goes to the relay and the wire from the relay goes rearward to the inertia sensor in the trunk(Or kickpanels) which acts like a breaker and then the power goes to the pump.

Posted on Mar 19, 2014

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Posted on Jan 02, 2017

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  • 11 Answers

SOURCE: 96 mercury cougar xr7 fuel pump

Check your local library for repair manuals...

Posted on Nov 08, 2009

  • 1 Answer

SOURCE: Fuel pump problems

you have a shut off button in the trunk find it turn it off and turn it back on

Posted on Nov 25, 2009

  • 37 Answers

SOURCE: I PUT A NEW FUEL

DID YOU CHECK THE FUEL KNOCKOF SWITCH IN THE TRUNK

Posted on Jun 06, 2011

  • 946 Answers

SOURCE: Fuel pump not always on

Did you reset the inertia switch that shuts pump down in case of collision?

Posted on Feb 22, 2012

riveraccs
  • 1 Answer

SOURCE: Engine won't start, turns over, but no fuel

I have a similar problem with my 99 cougar. It will start when I spray starting fluid in the intake and I have gas at the test point but it doesn't seem to make it to the injectors.

Posted on May 16, 2012

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First, if you would like to receive USEFUL information about your vehicle, (ESPECIALLY when you are asking about engine controls) it would be nice if you would mention WHICH ENGINE your vehicle is equipped with!

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3.8L NON-SC VIN CODE [4]
3.8L SC VIN CODE [R]
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1 Answer

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