I HAVE A 1984 MERCURY GRAND MARQUIS. I TURN THE KEY ON AND IT WILL GIVE IT A SHOT OF GAS AND STOPS. IF I HOLD THE KEY ON THE ON POSITION IT KEEPS GETTING FUEL BUT ONCE I LET GO IT STALL. IT HAS A NEW FUEL PUMP AND I CAN HEAR IT RUN WHEN I TURN THE KEY ON. HOPE YOU CAN GIVE ME AN IDEA WHAT TO LOOK FOR. THANKS MARIO

Asked by Dec 19, 2014 at 08:02 PM about the 1984 Mercury Grand Marquis

Question type: Maintenance & Repair

I HAVE A 1984 MERCURY GRANDMARQUIS. WHEN I TURN THE KEY ON IT GETS
ONE SHOT OF GAS AND STOPS. IF I HOLD THE KEY ON THE ON POSITION IT WILL
KEEP GETTING GAS, BUT ONCE I LET GO IT STOPS. HOPE SOMEONE CAN HELP.
THANKS, MARIO

2 Answers

1,130

Replace fuel pump relay for sure (check owner's manual, or google it), Check inertial fuel shut off in L trunk. There are some other things, someone will probably chime in

1 out of 1 people think this is helpful.
320

Also check fuel fiter not sure if a 1984 is fuel injected or carbureted if fuel injected filter is down underneath car on frame rail by right rear tire, if carburated it is either in carburetor by gas line or in the the gas line just before carburetor. It must be fuel injected because you you could hear the pump running in tank fuel injected cars have there fuel puns in the Gas Tank

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