Question about 1999 Mercury Villager

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Drives the van for about 20 minutes then it dies. does not overheat. replaced the sensor to the fan, new spark plugs, plug wires, distrubeter cap. what do we look for next?

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  • jrodgers1959 Aug 28, 2010

    it looses power then dies, and no it don't start right back up, have to wait till it cools down.

  • jrodgers1959 Aug 28, 2010

    it looses power then dies and no, it won't start right back up, have to wait till it cools to start it.

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  • Master
  • 662 Answers

Just curious, how does it die.....does it just stop or loses power completely as you are driving along.....and does the car start right back up again or do you have to wait until it cools down ???

Posted on Aug 28, 2010

  • 3 more comments 
  • Luke Bradford
    Luke Bradford Aug 28, 2010

    ok....does the engine light come on......or have you noticed anythin else happening.....so it only happens when engine is hot.....

  • jrodgers1959 Aug 28, 2010

    No engine light don't come on, and it does not overheat. Don't notice anything else happening.

  • Luke Bradford
    Luke Bradford Aug 28, 2010

    Ok...the explanation......your vehicle has an engine ecu and is fuel injected.......and the timing of the spark is provided by the ecu, which triggers an ignition module housed inside your distributor......heat increases resistance which opposes electron flow......so as your engine heats up (normal operating temperature), the ignition module is breaking down and ou lose the spark to the spark plugs........



    my suggestion is to purchase a second hand distributor assembly and swap it out as a unit, as to remove and disassemble the distributor to get to the ignition module, would be labour intensive, and you would require some mechanical knowledge to be able to do this......


  • jrodgers1959 Aug 28, 2010

    the ignition module was also replaced. It still does the same thing. we let it run for about 20 minutes, then it died.

  • Luke Bradford
    Luke Bradford Aug 28, 2010

    ok....then what the next step to do is if you have a scan tool and put it onto 'monitor mode' and what you need to do is scroll down to crank angle sensor, camshaft sensor and see if when the engine stops, the readings on these sensors fail as well...... i would not suggest any further replacement of components because it would be guesswork....the ignition module is common to fail thats why i suggested this......if you do not have this tool, i would employ the services of a mechanic who does and use him for diagnosis only !!!!

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