Is my fuel pump going out? If not whats wrong?

1994 MERCURY MARQUIS
160,000 MILES
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STUDEBAKER16
  • MEMBER
  • 1 POST
It has about 160,000 miles, I changed fuel filter, spark plugs, spark plug wires, air filter, and 1 of the 2 coil packs.
When the vehicle is cold, I start up the engine and it runs fine until I step on the gas, in drive, reverse, or park. It stumbles really bad until the engine is warmed up.
When the vehicle is warm, I floor it when I get on the acceleration ramp and I noticed it accelerates faster if I let up on it a little bit.
Is it the fuel pump not getting enough gas to the engine?
May 20, 2012 at 2:27 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Do you have a check engine light? Check the fuel pressure if its within specs-start here
May 20, 2012 at 2:39 AM
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