Auto Answers » Preventive Maintenance » Mercury

Mercury preventive maintenance repair questions and answers

Post your Mercury preventive maintenance question or share what you know by answering questions

Browse Mercury Categories

221 Questions
Sort by:
  • AutoMD Member
    AutoMD Member - 2004 Mercury Monterey - Preventive Maintenance - 4/21/2014
    How do you turn the check engine light off.
    put a new fuel pump & fuel filter on after having it put on a diagnostic computer. it said I had low psi on fuel system. I unhooked the battery & it went of but came back on after 12 miles.
    • Jimm
      4/21/2014 Jimm
      The check engine light is located on the dash and stays on if the computerized engine control system detects an engine performance or emissions problem.

      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA, etc. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light. There are literally hundreds of possible fault codes and therefore numerous reasons for the MIL condition.

      This step is important - retrieving the stored fault code and relaying this detail - will provide good information to assist in diagnosing and repairing the issue you are having.
  • AutoMD Member
    AutoMD Member - 2001 Mercury Grand Marquis - Preventive Maintenance - 3/17/2014
    Why does the air/heating cut off and on
    sometimes the blower will just start by its self when i have the heat or ac on the blower will go on and off.
  • AutoMD Member
    AutoMD Member - 2001 Mercury Grand Marquis - Preventive Maintenance - 2/18/2014
    Why doesn't my seats, locks, trunk, and fuel door not work?
    I have changed the #7 fuse twice and still nothing works. I went through the steps of unhooking the battery and resetting the computer just like the owners manual said to do. Still not working. Can someone help me out??
    • jdl
      2/18/2014 jdl
      For the driver power seat, did you check for voltage at fuse 7--20 amp, underhood fuse block. Use a testlite to check for voltage at the fuse circuit, hot all the time.

      Check the wiring harness that goes into the driver door on the hinge side. For the driver side power seat, the black wire with white tracer is voltage. Black wire ground, check them both. Make sure wires aren't broken, because the driver is open and closed a bunch.
  • AutoMD Member
    AutoMD Member - 1999 Mercury Villager - Preventive Maintenance - 2/3/2014
    Right side window glass not going up.
    mileage 180,000. it never happen before it just been out suddenly.engine was on.
    • HouseCallAuto
      2/3/2014 HouseCallAuto
      Try smacking the interior trim panel bith the side of your fist while activating the switch and it might come alive.
      2/3/2014 AutoMD Member
      I did it not work.
    • HouseCallAuto
      2/3/2014 HouseCallAuto
      You will need to pull the trim panel and check for battery voltage and ground at the motor connector while activating the switch.
  • TomCat
    TomCat - 1994 Mercury Grand Marquis - Preventive Maintenance - 11/29/2013
    1994 mercury grand marquis oil filter adapter gasket how to replace
    1994 mercury grand marquis oil filter adapter gasket how to replace and the cost to replace. find local mechanic (60453)
    • Jimm
      11/29/2013 Jimm
      There are several places that the Oil Filter Adaptor can leak oil. Three to be exact. 1. block side, 2. oil filter side, and 3. Oil Pressure Sending Unit (OPSU) side. It can also leak coolant from the coolant-hose side. So there are basically 4 areas where it could leak from. Assuming you meant leaking oil.

      First, are you sure it's leaking from the Oil Filter Adaptor gasket? Can you see any cracks in the OFA?
      Is it leaking from the BLOCK side, or the Oil-Pressure Sending Unit side?

      If the block side is leaking, maybe the bolts are just a little loose, will tightening them up make the leak go away? Check as a first step - is the filter on tight?
      If the OPSU side is leaking, clean the area well and see if there are any cracks. Sometimes people overtighten this and break the OFA.
      If there are no cracks, see if tightening the OPSU **C A R E F U L L Y** makes the leak go away. This is pipe thread which keeps expanding, and will break the cast-aluminum OFA before it bottoms OR tightens completely! 1/4 to 1/2 turn increments is fine. You want it to be snug, not real tight though. If this doesn't stop your leak from the OPSU, you should remove the OPSU, use a wire brush on the threads, use a good thread sealant (Permatex is good) and rethread the OPSU into the OFA ** C A R E F U L L Y**. If this doesn't work, then there is a hairline crack in the OFA, or oil is running down from the block and running downhill to the OPSU area.

      If there is a crack in the OFA (you may not be able to see it), you have to replace it. This is available aftermarket - Canton racing products - as example (pn 22-626)

      If there are no cracks, and it's leaking from the block side and seems to be coming from the gasket between the block and OFA, then you probably only need to change the gasket. The weird thing is I thought these cars had those steel-and-rubber gaskets for the OFA. The gasket is definitely reusable, but on a '92 maybe it is just corroding or too dry. Anyway the gasket was like $3.80 each (

      Changing the OFA adaptor for me wasn't really hard, just a pain because the oill filter adaptor in these cars also has engine coolant running through it, which means you'll have to drain the coolant from the car.

      So you'll need:

      -Two (2) drain pans, 1 for whatever oil is in the filter, one for coolant
      -oil filter wrench
      -10mm socket, various swivels/extentions, ratchet
      - Iuse this "remote" OEM hose clamp removal tool. Basically it has what looks like a bicycle brake cable attached to it, and these two small jaws which fits the OEM hoseclamps. A lot of the time the clamps are positioned in a way so that it is hard to get a pair of pliers/channellocks in there. Made the job SO much easier.
      -small wire brush
      -pair of channellocks to remove OPSU
      -hydraulic floor jack
      -suitable jackstands for frame

      -Replacement coolant (book says 14.1 QT. for '96 and earlier, '97 -'00 take 15.8 Qt, but you won't need to add EVERY drop)
      -Replacement oil (roughly 1 QT)
      -New oil filter(optional)

      Spray OFA bolts with libricant; WD40, PB Blaster, etc.

      Drain the coolant, then jack up the car to oil-change height. Then remove the oil filter (drainpan #2), then put a rag over the filter side of the OFA to prevent any debris from getting in there. keep the drainpan, you might need it because you will find little leaks when you pull the OFA off the block.

      Then find the best socket / extension / swivel combo that will allow you to reach the OFA bolts, I believe there are four (been a while). Also behind I think (2) of the bolts there is a wiring bracket which holds a couple of wires on a clip, which I believe run to the PS pump. When you see it you'll know what I mean. Just break them loose a little.
      Remove the coolant hose from the coolant-hose side of the OFA.
      Remove the OFA bolts, remove the OFA but keep that little clip holding the wires there, and remove the gasket if it is stuck to the block.
      Shove a clean rag in there to keep trash / dirt out.

      If you are using a NEW OFA, you will have to either swap your old OPSU into the new OFA, or buy a new OPSU to go with your new OFA. Follow the same process decribed above, using thread sealant to seal the threads, and again ** C A R E F U L L Y ** thread into the NEW OFA.
      If you're just replacing the gasket , then skip that last part, because you will be retaining your stock peice.

      The gasket part # is F6AZ-6840-AA (OEM), or Fel-pro pn 70415, Victor Reinz pn B31703.

      With the rag in place, just wirebrush the block surface (good to do if it's a little rusty or grimy, then clean around the area.)
      Position the new gasket on OFA (new or old), (hang the gasket on the easiest bolt to do up and start it in the threads then align the gasket and fit a second bolt, I think the idea of the hexagon hole in the gasket is so that it grips one of the bolts to help with alignment.)
      then carefully pull rag out t
  • AutoMD Member
    AutoMD Member - 2004 Mercury Mountaineer - Preventive Maintenance - 11/27/2013
    I hear a roaring sound when I get up to 60-65 mph, then when I slow down, I hear a clicking noise
    This is the first time I've noticed this sound since I bought the vehicle 6 months ago.
    • Maize
      11/27/2013 Maize
      Bad wheel bearing most likely cause.
  • AutoMD Member
    AutoMD Member - 2003 Mercury Grand Marquis - Preventive Maintenance - 11/10/2013
    Why do my headlights go while drivin and com back on and go back out
    this happen while drivin at anytime
    • HouseCallAuto
      11/10/2013 HouseCallAuto
      Replace the Lighting Control Module. Probability here is near 100%.
  • AutoMD Member
    AutoMD Member - 2003 Mercury Grand Marquis - Preventive Maintenance - 11/10/2013
    Why does my headlights go out when I'm driving down the road
    this happens while drivin down the road while sittin still as well
    0 answer
  • AutoMD Member
    AutoMD Member - 2006 Mercury Grand Marquis - Preventive Maintenance - 11/6/2013
    My head light will not work on low beam.
    The only way i have any lights is to hold the turn/high beam lever on and hold it while driving. this keeps my light on in 'High" beam. It is interesting to notice that when if is fairly cold outside (50's) the regular beams come on and stay until engine is warmed ...
    • HouseCallAuto
      11/6/2013 HouseCallAuto
      Replace the lighting control module. Probability here is near 100%. You can google it to see location of module in your car.
  • ihland
    ihland - 1993 Mercury Grand Marquis - Preventive Maintenance - 9/2/2013
    It keeps blowing fuses. Why? Turn signals don't work. Brake lights don't work.
    The mechanic says that I could possibly need a turn signal switch. Is this switch inside of the steering column? Diagnosis is not positive?
    • diyautoelectric
      9/1/2013 diyautoelectric
      it blows fuses because there is a short. turn signal switch is inside of the steering column. If it blows as soon as you put a fuse in it , you can try disconnecting things till it stops blowing the fuse . you need to isolate which wire is shorted of if it is a switch that is bad
    • bear.1216
      9/2/2013 bear.1216
      You should also check out the rear bulbs. Excessive corrosion in the bulb sockets can cause shorts. If your vehicle is wired for trailer lights check that wiring as well.
  • billnjane
    billnjane - 2005 Mercury Montego - Preventive Maintenance - 8/28/2013
    At 107 K miles, I would like to inspect//replace the serpantine belt on my 2005 Mercury Montego. Question: do I have to remove the fendor splash shield? If so, can I do this without a "Lift"....I have Jack stands, floor jacks, and bottle jacks. Thanks for any ...
    • wbrockstar
      8/28/2013 wbrockstar
      Yes removing the splash shield is the best way to gain access.Its best if you have 1 person working on the upper pulleys while youre lying on the ground to get to the lower pulleys.Lift the vehicle up just high enough so you can work in a more comfortable position.You dont need a lift,but use those jack stands for sure,cause theyll save your life
  • ejstrom
    ejstrom - 2007 Mercury Grand Marquis - Preventive Maintenance - 7/5/2013
    Has there been a problem changing spark plugs
    I have heard that spark plugs have broken off in the block when being removed for replacement. Is this true!
    • CVO
      7/5/2013 CVO
      I help AutoMD for the last 3 years, i heard one case of a broken off spark plug in the block.
  • gaelynnvarney
    gaelynnvarney - 1990 Mercury Sable - Preventive Maintenance - 6/19/2013
    Power steering goes out, water coolant leaks,
    when cold, you can hear a whine and a squeal. when it is warm, power steering goes out intermittenly,then when I park, all the coolant leaks out from underneath. could it be a power steering hose or leaky pump? Power steering fluid is full. Just coolant leaks like a ...
    0 answer
  • huntington.ashley1
    huntington.ashley1 - 2002 Mercury Mountaineer - Preventive Maintenance - 5/26/2013
    When I started my Mountianeer, there was a clicking noise in the back trunk area.
    I took off the paneling in the back to locate it. When the following connection ( 1f2t-14a464 ga-000) was unplugged, it stopped. This did not affect the driving. BUT I can not find out what that piece controls. Can you be help me!!! Thanks!
    • huntington.ashley1
      5/26/2013 huntington.ashley1
      This is actually a 2003. SORRY!
    • HouseCallAuto
      5/26/2013 HouseCallAuto
      Maybe a power antenna? When they go bad they ratchet / click and if it is not an antenna, maybe this is a connector that attaches to a blend door actuator for your optional rear heat / ac unit. When the BDA goes bad it clicks.
  • djv103061
    djv103061 - 2007 Mercury Montego - Preventive Maintenance - 5/14/2013
    I cannot locate the vertical headlight adjustment screw
    The owners book just points to the location but I can't see the screw
    0 answer
AutoMD Verified Customer
AutoMD obtained proof this customer interacted with the shop.