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Mercury Grand Marquis 86. When I crank it it starts strong, it slowly dies out. New solenoid and starter need help. Disconnected the engine from tranny tried everything I just need some fresh thoughts anything will help

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  • Have you checked all the cables including the ground cables between battery and body and body and engine?
    – Solar Mike
    Commented May 21, 2018 at 8:09
  • Thank for reply I have and also just to make sure I cleaned it up to ensure it has good connection
    – Jonee140
    Commented May 21, 2018 at 12:22
  • Also forgot to add I can turn the crank manually 360 with no problem
    – Jonee140
    Commented May 21, 2018 at 12:39
  • This sounds like a fuel issue. Which engine is your Grand Marquis running? The 5.0 is fuel injected and has an electric fuel pump. If the pump isn't keeping up, it would give you the basic issue you are talking about. To see if it's keeping up, you'll need to put a fuel pressure gauge on the fuel rail to see how the fuel pressure is behaving. If it tapers off right after starting, it could be the in tank fuel strainer, the fuel pump, or the fuel filter (or a combination of any of the three). If this is the 5.8L engine, it could be the manual fuel pump, but not quite sure. Commented May 21, 2018 at 13:37
  • It is a 5.0 and the fuel pump inside the engine correct?
    – Jonee140
    Commented May 21, 2018 at 20:06

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