Question about Mercury Villager

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I have a 97 mercury villager mini van, and lately I have been having bad problems with what I'm thinking might be vapor lock, but when it is hot outside, temperature wise or the engine gets over worked, when you try to accelerate, it causes the car to sputter and then stall out until it cools down, any idea's? I've already tried the ignition coil....

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  • the_libra007 Jul 20, 2010

    what are all the possibilities for this problem where the car gets suffacted and the gas doesn't get thru only when it is hot outside? If it was a fuel pump, then wouldn't it be anytime that might happen? And, why does it start up again and then work once the car is cooled down?

  • the_libra007 Jul 20, 2010

    what else might cause this, it only occurs when its hot outside?

  • the_libra007 Jul 20, 2010

    I'm not sure I'm satisfied with this answer.

    What are all the possibilities? Why is it only when its hot outside? Once it chokes out, but cools down, it drives again?

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  • Mercury Master
  • 6,826 Answers

It may b a fuel pump not supplying enough pressure, a fuel filter not letting enough gas through, or it could be a vacuum leak. It could be any number of things, actually.

If you tried the ignition coil and that didn't help at all, and you are presented with a myriad of possibilities, you may want to take the car to the dealer and have them perform an 'engine analysis' to check out every component that could be causing this problem.

Do you have a service engine light? Sometimes codes get stored in malfunctioning engines and they can be read and help the technician diagnose the problem, more quickly.

Posted on Jul 20, 2010

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  • Duane Wong
    Duane Wong Jul 20, 2010

    There are quite a few possibilities for the engine not working right when hot but starting up ok when cold. That's why I asked if the OBD-II system has any codes for the engine?



    I would be suprised if there was no Service Engine Soon or Check Engine light with the serious symptoms described.



    I was just describing the first things that came to my mind, but sometimes that doesn't mean anything, and the computer's diagnostic system is what to really follow.



  • Duane Wong
    Duane Wong Jul 20, 2010

    vapor lock is not found in more modern cars like yours, it happens in cars that have carburetors.

    The only thing that I found that is like a carburetor on your car is the 'idle speed adjustment' which is usually controlled by the computer, but on your car is controlled by a screw on the throttle body.

  • Duane Wong
    Duane Wong Jul 20, 2010

    If it is temperature related, I also think it could be a coolant temperature sensor that is not calibrated. But, then again, I am reluctant to say it's any one given part, because these systems are so sophisticated, and I believe that if your car is stalling that some code would be stored in the computer.

  • Duane Wong
    Duane Wong Jul 20, 2010

    A bad O2 sensor could also cause a problem, since it works when the engine is warmed up rather than when you first start the engine.



    I think that that's about all I can say may be related to your driveability problem.



    Good luck on fixing this problem.

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  • Mercury Master
  • 2,359 Answers

Vapor lock only apply to high altitude traveling.

When your vehicle travel above 3000+ feet above sea level the air density is lower.

A dirty air filter will off set the 14.7:1 air to fuel ratio,

A rich burning engine will waste fuel.

Still will occur more frequent on high mileage engine.
Example:120,000 miles+

When was your last air filter change?

When was your last tune-up?

===

You can may use a product from a company call Lucas Fuel System Cleaner to remove some carbon off your engine and clean your injectors.

I have a 97 mercury - 31a6dda.gif.
========
Most likely cause for your stalling problem is small intake vacuum leaks.

As the motor age,the intake manifold gasket will leak.

========
I can not stress enough about TOPPING OFF gasoline when re-fueling.

A new driver in your family may be topping off???

DO NOT over fill. The addition gasoline will soak the EVAP system and cause un-explainable stilling problem.


Please email me move information after you do the Lucas fuel treatment.







Posted on Jul 20, 2010

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