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1986 plymouth horizon falls on its face going down the road intermittently. I have tried a distributor pick up and coil. The car has a new weber carb and fuel pump. It also has a complete tune up with fuel filter. The car started doing this before any of the maintenance. The tank had been checked to see if its clean and the lines blown through to check for blockages. I noticed this morning the cooling fan doesnt keep running after the car is shut off anymore. It used to run for 10 min or so every time. Any help is appreciated.

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  • Cars & Trucks Master
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I'd check the electric going to the fuel pump as well as any other devices. An intermittent short, bad ground wire can stop the fuel pump.
I'd be more specific with the description. "Falls on it's face", is not a good description.

Posted on Nov 21, 2013

  • 3 more comments 
  • zack jacobs Nov 21, 2013

    The car loses power and you can hear backfiring through the exhaust and a 1986 horizon has a mechanical fuel pump so there is no power to check

  • Ronald Thompson Nov 22, 2013

    How does the mechanical fuel pump get the fuel to the engine?The fuel pumps I saw for the Horizon all had electric connections on them.

  • zack jacobs Nov 23, 2013

    No electric connections on this one or the factory one I just replaced

  • Ronald Thompson Nov 23, 2013

    What about vapor lock? Are all the heat shields in place protecting the fuel lines?

  • zackerygj Nov 23, 2013

    that was one of the first things i checked everything is good there

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