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Mercury preventive maintenance repair questions and answers

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  • Steve
    Steve - 1998 Mercury Grand Marquis - Preventive Maintenance - 1/3/2012
    How Do I Change The Spark Plugs
    I See The Fuel Injection Supply Manifold Need To Be Removed. Do I Need To Remove The Throttle Body Before Removing The Fuel Injection Supply Manifold.On The Left Side There's A Bracket Under The Throttle Body That Cover The Rear Portion Of The Fuel Injection Supply ...
    • Spoon Sports
      12/5/2011 Spoon Sports

      Believe it or not, the easiest way is:

      1. Remove the plug wire by pulling it off carefully, grasp it close to the end. You can also buy a plug wire remover which is available at any parts store.

      2. Using a SPARK PLUG wrench (available at any parts store) - remove the old plug.

      3. Insert the new plug.

      4. Tighten, but not TOO tight.

      5. Push the plug wire back on.

      6. Repeat 1-5 for the other 7 plugs.

      You might find it easier to access some of the plugs via the holes above the tire wells. From the side of the vehicle, you'll see a hole near the top of the tire well. If you change the plugs, it's best to replace the wires also.

      NOTE: The wires and plugs on Grand Marquis are rated for 100,000 miles or more with proper maintenance.

      NOTE 2: Unless you area good mechanic, changing the plugs can cause you more heartache than the price of having a professional do it for you.
    • yboy82
      1/3/2012 yboy82
      You should remove the coil-on-plug units from spark plug. And then loosen spark plugs 1/4 turn and remove any dirt or foreign material from spark plug areas of cylinder heads (6049) with compressed air.

      Remove spark plugs .


      Follow the removal procedure in reverse order. And then tighten spark plugs to 9-20 Nm (80-177 lb-in).
  • joe lane
    joe lane - 1998 Mercury Sable - Preventive Maintenance - 12/29/2011
    Need help installing a fuel pump on 1998 mercury sable ( in tank pump). Maybe Video?
    Fuel pump
    • Ray
      12/29/2011 Ray
      You'll have to relieve the fuel pressure and remove the fuel tank. Remove the locking ring by turning it counter clockwise. Pull the module cover out to expose the locking tabs. Squeeze the tabs together and remove the pump module. I suggest a repair manual if no one has a video. It's about a 2.0 hour job for the shop.
  • whitebear
    whitebear - 1996 Mercury Grand Marquis - Preventive Maintenance - 12/15/2011
    Gas smell from the trunk
    gas smell in the trunk as well as some times smells a little in the car itself,mainly from the trunk not all the time,was told of a filler tube may have to be replaced? ty
    • 92bimmer
      3/17/2010 92bimmer
      have you noticed any gas leaking on the ground on the side where you fill the car with gas? Open the trunk and see if if filler tube is able to be seen from there, maybe by removing a panel in the trunk to view it. That would be the place to start looking.
    • RC
      3/17/2010 RC
      Sounds like it could be the fuel pump, tank, lines, or the filler tube. I hope you're not driving it... This problem needs to be fixed asap.
    • whitebear
      3/18/2010 whitebear
      no gas leaks at all but you do get the smell of gas from the trunk not all the time they say maybe filler tube? ty for the help and if you or some one have any more idears please let me know ty
    • theoldstoryteller
      10/25/2011 theoldstoryteller
      Could be a filler tube? My guess would be a bad seal on your fuel pump if it is under the trunk. It could also be a leaking line or the smell could be a hole in the tail pipe or muffler that creates a similar smell. It could also be a rusted hole in the gas tank?
    • don
      12/15/2011 don
      maybe could be a rusty fuel line take a look under the car by your gas tank
  • Bobbi
    Bobbi - 1997 Mercury Villager - Preventive Maintenance - 12/1/2011
    Why did the wipers stop in the middle of the windshield?
    • Spoon Sports
      12/1/2011 Spoon Sports
      Good day,

      I have a diagram and troubleshooting steps in this forum, i used it for my Civic, im quite certain its the same as your villager, you need to locate the fuse panel and check the fuse to the wiper motor, it may have blown and needs replacing

      Also, does it happen on all Wiper modes?

      Just scroll down until you see the pics

      Please do not reply by clicking "Reply". reply by clicking "Answer Question" so it will reflect in my INBOX so i can get back to you if something comes up. If you post a comment, it will not appear on my inbox and i wont be able to follow your question.
  • robert
    robert - 1995 Mercury Grand Marquis - Preventive Maintenance - 11/27/2011
    Does sea foam really work?
    What is the proper use for this product? Can you just add this to a full tank of gas? After using will you get better gas mileage?
    • texastough
      11/27/2011 texastough
      Does it work? Yes. It does what it is designed to do. That is, clean your fuel injectors. Over time, the tips will build up with composites and other things that retard the flow of fuel through the injectors. Sea Foam (and other brands, i.e. Chevron with Techron) remove this build up, thus increasing the flow of fuel out the injector.

      Can you add it to a full tank of gas? Possibly. Every formula is concentrated for a certain amount of gas. Pouring a 6 gallon concentrated mixture into a 12 gallon tank will dilute the cleaner and render it mostly useless. Check the bottle and add to the specific amount of gas it was concentrated at.

      Does it give you better gas mileage. Possibly, and no more than 1 mpg. Depending on the amount of build up, yes, it will help alleviate some blockage thus allowing your engine to receive the proper amount of fuel per combustion cycle. However, it is rarely noticeable and usually never more than about one mpg. Some will claim more, but there are so many factors (mainly your foot ;) ) that affect that number.
    • HouseCallAuto
      11/27/2011 HouseCallAuto
      I don't buy any of the claims. Gasoline has sufficient additives already in it to keep injectors clean. IMHO
  • robert
    robert - 1995 Mercury Grand Marquis - Preventive Maintenance - 11/25/2011
    What is the best battery for a 1995 grand marquis?
    Advanced auto parts has a sale on there gold star brand, is this a quality battery? Are all batteries about the same quality? Thanks!
    • Jimm
      11/25/2011 Jimm
      Buy the battery that; fits your vehicle and has the best warranty - that you can afford.
    • HouseCallAuto
      11/25/2011 HouseCallAuto
      It's all about the CCA (Cold cranking amps). The higher the CCA the better the battery and usually the higher the price. The heavier the battery gets carrying it is the better battery.
  • PHIL
    PHIL - 2006 Mercury Mountaineer - Preventive Maintenance - 11/24/2011
    Were is cylinder 8 car shakes i put machine on code say misfire 8
    have to replace cylinder 8 for a miss fire do i change all plugs
    • jdl
      11/24/2011 jdl
      Number 8 cylinder should be driver side rear. You can check spark at the plugs, then check injector pulse.
      11/24/2011 PHIL
      thanks i appreciate it
      11/25/2011 jdl
      Let us know what you find.
  • robert
    robert - 1995 Mercury Grand Marquis - Preventive Maintenance - 11/20/2011
    What is the best and brightest headlight bulb replacement? Thanks!
  • robert
    robert - 1995 Mercury Grand Marquis - Preventive Maintenance - 11/18/2011
    What is the best fuel system cleaner that can be purchased
    • Jimm
      11/18/2011 Jimm
      Don't usually like to respond to a question with a question, but why do you need a fuel system cleaner? What factors or circumstances are presented to warrant the fuel system cleaner question?
      As long as the fuel system filters are changed regularly on your vehicle and you use the correct grade of fuel - there should be no need for the fuel system cleaner additives.
  • DaveF1953
    DaveF1953 - 1991 Mercury Tracer - Preventive Maintenance - 11/5/2011
    Is the Fuel filter In-Line or is it in the Gas Tank? From what I pull up on this website, it looks in-line.
    Is there also some way to change the Thermostat? It appears to be under the distributor cap and gives me the willies looking at it.
    • MasterTech
      11/5/2011 MasterTech
      The fuel filter is located in the engine compartment, mounted on the left hand fender apron next to the shock tower.
      The thermostat is not as hard as it looks, the labor time is 1.1 hours
      11/6/2011 DaveF1953
      Thank you very much. I owe you. If you have any PC questions, I'll be happy to help.
  • Billy Reynolds
    Billy Reynolds - 1999 Mercury Sable - Preventive Maintenance - 10/31/2011
    Where is the drain plug on the radiator
    • Jimm
      10/31/2011 Jimm
      The drain plug on the radiator (if equipped) would be located on the underside or on the bottom of the radiator. If no drain plug - then loosen the lower radiator hose clamp and remove the lower hose connection at the radiator to drain the radiator.
  • mike
    mike - 2003 Mercury Mountaineer - Preventive Maintenance - 10/29/2011
    Replaced the blend door actuator but the door still dont change from cold
    heard one of the other door slam shut and then it started working for a minute ,i shut the car off and started it back up and tried it again and it wouldn't work
    • HouseCallAuto
      10/29/2011 HouseCallAuto
      Remove the blend door actuator and move the door by hand to confirm that the door is not broken and that you are able to vary the temperature. Are you sure that what you replaced was the temperature blend door actuator and not a different actuator? That would explain why you still do not have heat. You could also have a Broken Blend Door Crank Arm.
  • Keithbaby
    Keithbaby - 2005 Mercury Sable - Preventive Maintenance - 10/29/2011
    AC was blowing cold then started blowing warm air - told clamp broken -need 'AC HARNASS'?
    AAmco in Richardson "repaired" AC 1yr and 4 days ago -yesterday stopped blowing cold for 4th time -told it was broken AC harness/clamp -compressor plug will not stay in. AC blows but warm, musty air. Have checked with 2 Ford dealerships -NAPA -lkq -autozone and ...
  • pezza
    pezza - 1996 Mercury Sable - Preventive Maintenance - 10/25/2011
    Headlights and wipers don't work all the time. The high beams work if the control is positioned just right.
    could the control on the steering colum also control the headlights even though the light switch is on the dash? You have to push back the control to put on the high beams.
    • theoldstoryteller
      10/25/2011 theoldstoryteller
      It sounds like you need to replace that switch.
      10/29/2011 rdoss
      replaced dash switch , marker lights (orange on side) work still no headlights
  • rscottjr1987
    rscottjr1987 - 1993 Mercury Cougar - Preventive Maintenance - 10/24/2011
    What Could drain the battey on my car?
    I have put a new battery in the car, I have checked the alternator, which is good. But the battery keeps losing its charge.
    • Bill
      10/16/2011 Bill
      How long does it take to loose it's charge? And how did you check alternator?
      10/17/2011 rscottjr1987
      I checked the alternator by disconnecting the battery while the car was running, and so far it hold a charge for about 24 hours then its dead, I also did a ground test at night. The ground sparked meaning that something is grounded, but i don't know what. This is what im trying to figure out. Thanks
    • Bill
      10/24/2011 Bill
      Actually this means that you have a drain somewhere whether it is a glove box light a trunk light a under hood light or a dome lite. And try not to test alternator in this fashion in the future you may blow out a trisister diode if not careful on these newer alternators. also check if possible with a ampmeter when neg term disconnected to see what the draw is.