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2000 mercury mystique when stopped at light and at take off it feels like about to run out of gas it surges

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Ck the fuel pump

Posted on Apr 22, 2014


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Posted on Jan 02, 2017

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SOURCE: firing order of mercury mystique

What engine size and year?

Posted on Mar 22, 2009

  • 1 Answer

SOURCE: mercury mystique starter location

its a 6 I beleive its a 2.5

Posted on Mar 24, 2009

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SOURCE: My 1997 Mercury Mystique dies

Check the AIS (idle speed motor) the bypass passage may be clogged with crankcase vent sludge. This is a problem I found many vehicles

Posted on Apr 04, 2009

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SOURCE: How do I change the Flasher on a 2000 Mercury

The turn signal flasher for a 2000 Mercury Mystique is located at the top of the steering column on the back of the multifunction switch. It plugs into terminals 31, 49 and 49A shown in the picture below.

You can get to it by removing the screws and taking the steering column shroud off.

The place to buy one would be at an auto parts store. (Just pick one...they should all have it.)


Posted on May 15, 2011

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SOURCE: Where is the PCV valve on a 2000 Mercury Mystique

Here are some pictures showing where the pcv valve is located on the 2000 Mercury Mystique, 4 cylinder.

First we see the engine compartment:
Next we will see a closeup of the area circled in red.

here I have outlined the PCV valve in red and the thermostat housing is circled in green. The pipe connected to the PCV is rigid metal. It is screwed to the motor, so you must remove the screw before you can pull on the pipe in order to extract the PCV valve. The screw is located underneath the thermostat housing, so the housing must be removed in order to get at the screw.
The head of the screw is inside the orange circle. I had to use a torx bit. Yours may be a phillips head. Here are a couple of closeups:
After I replaced the valve, my car was still surging at stoplights, so I started doing more troubleshooting. Lying under the car, looking at the side of the engine closest to the firewall, I saw a hole in a rubber tube. I crawled out and located this hose. If you follow the metal tube that the PCV valve is held in, you will find that it is inserted into a rubber hose after you get past the thermostat housing and it continues on to the back side of the engine. It turns out that this is the hose that I observed while lying on my back under the car. Apparently there is a bend in the hose and at that bend it fails due to heat buildup. Oh, well.

When I went to the dealer, his 2000 Mystique diagrams did not show this part, but he made a guess and it was the right part. Make sure and take the one from your car to the dealership for comparison. After replacing the piece of hose, the car runs perfectly :) .

Posted on May 21, 2011

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I have a 2000 Mercury Mystique. It starts fine and sounds fine but when I push the gas pedal, it will hesitate for a second, then lunges forward & squeals tire. Does anyone know what the problem is?

Backfiring in internal combustion engines occurs outside of the combustion chamber, and is typically the result of an improper air to fuel ratio. An overly lean air-fuel mixture (i.e. an overabundance of air) can lead to a failure to ignite in the combustion chamber, also called a "misfire".

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1 Answer

Why does my 1999 mystique will crank and run but runs rough

Sounds like your idle valve has stopped working . Does it run fine when warmed Up? If so I would clean the throttle body and remove the idle valve and clean it. After reinstalling it have someone turn the key on while you tap the idle valve lightly with a screw driver Handel. Then see if it will idle when started. If it does then you need a new one.

Sep 01, 2014 | 1999 Mercury Mystique

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2000 mercury mystique when i brake to stop vehicle is cutting off

Sounds like a throttle body issue or idle valve problem. I would clean the throttle plate and idle valve

Jun 11, 2014 | 2000 Mercury Mystique

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Mercury mystique says its hot, but its not!

were is the other temp senors at on 97 mercury mystique

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My 2000 mercury Mystique will not start when it is cold

sounds like you have a fuel problem either pump of filter .

Nov 23, 2017 | 2000 Mercury Mystique

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I have a 2000 chevy blazer with a 4.3 vortec motor,my problem is when i'm cruising at a steady speed the engine surges it usually happens around 45-50 mph


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I have a 2000 mystique with a v-6 . Replaced fuel pump and filter. Still have same problem idles but no off idle throttle. Scaned car has a code of low fuel pressure. Could this be a pressure regulator?

More than likely, yes. If the regulator is controlled by a vacuum feed, try removing the hose from it and run the engine. If you feel that it will run off-idle after you've done this, replace the regulator and be on your way.

Jul 02, 2010 | 2000 Mercury Mystique

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