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Mercury preventive maintenance repair questions and answers

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  • TX_runner
    TX_runner - 1999 Mercury Sable - Preventive Maintenance - 9/22/2010
    Why does heat comes out when the AC it turned on?
    Yesterday I tried turning on the AC in my 1999 Mercury Sabel, but the heater came on. Last week the AC was working fine.
    • HouseCallAuto
      9/21/2010 HouseCallAuto
      A faulty blend door actuator can do this. This is the small motor that moves the air door and mixes cooled air with heated air. It's posityion is determined by the temp control knob. You should see an immediate difference in the temperature of the air and the sound of the air as you move the knob from hot to cold and cold to hot. If you hear no change it is likely that the actuator is faulty and has become stuck in the heat only position. It is not hard to replace.
      9/21/2010 TX_runner
      When the AC was working I could hear the sound when switching from hot to cold but now I don't. How do I fix the knob if its stuck on the heat position? I've been doing some research and I was thinking about replacing the ac temperature switch, do you know of a website where I can find that specific part? Thanks for the answer.
    • HouseCallAuto
      9/22/2010 HouseCallAuto
      It is not a problem with the temperature control knob, it is the actuator that is supposed to move when the temp control knob is turned. Get a repair manual for your car and follow the steps and pics to replace the blend door actuator. >>
      9/23/2010 TX_runner
      Thank you very much for your help, im going to order the part this week.
  • robin
    robin - 1987 Mercury Grand Marquis - Preventive Maintenance - 9/21/2010
    My tail lites and dash lites are out..blinkers works and head lites.. but went same time..
    checked fuses and bulbs
    • HouseCallAuto
      9/21/2010 HouseCallAuto
      Verify fuse #4 has power on both sides of the fuse with the tail lamps switch in the on position.
  • cynallison
    cynallison - 2005 Mercury Grand Marquis - Preventive Maintenance - 9/19/2010
    The cruise control stopped working cant find out what made this happened or what todo to fix it.
    I went to the auto zone the tech came to the car with me checked the book and looked in the car and couldnt find anything. Help, please.
    • DrkShdw983
      9/19/2010 DrkShdw983
      when you try to put the cruise on what works and what doesn't?

      1.) When you turn the cruise master switch on does the light light up?
      Yes: continue
      No: Check fuses and relays related to cruise control

      2.) If you set it does the light on the dash come on?
      Yes: Replace cruise control actuator
      No: Replace master control for cruise

      Hope this helps!
  • birdmann93
    birdmann93 - 1998 Mercury Mystique - Preventive Maintenance - 9/16/2010
    I put new fuel sending unit in dont work take out it works whats wrong?
    • yboy82
      9/16/2010 yboy82
      It is possible that there’s a frayed wire in your fuel sender and when you put it inside your fuel tank it touched the fuel tank (body ground). Check the wires and connection of your fuel sender.
  • Brad.hull08
    Brad.hull08 - 2004 Mercury Sable - Preventive Maintenance - 9/15/2010
    Rear suspension problems. Tires hitting wheel well
    The rear suspension is not holding enough of the weight... when we go over a bump or out of a parkinglot the wheels hit wheel well.
    • yboy82
      9/14/2010 yboy82
      Your rear suspension components may be failing. Check the condition of your suspension components you can visit this link to have an idea how to perform it
    • Zeke
      9/15/2010 Zeke
      If your car isn't sagging in the rear, and you don't have plus sized tires, and you don't have an excessive amount of weight in the rear then it might be your shocks. Go to the rear of the vehicle and bounce the car up and down when you stop bouncing the car it should go up then down and settle in that position. If it bounces more than that after you stop bouncing it then you will need to replace you shocks.
    • Bill
      9/15/2010 Bill
  • Aslan
    Aslan - 1994 Mercury Cougar - Preventive Maintenance - 9/15/2010
    Where can I find a key for the wheel lock?
    I had tires put on and they lost my key for the wheel lock. They never got back with tme to replace it. I need brake work now, but need the key. Thanks!
    • Bill
      9/15/2010 Bill
      Basically you can't. Mechanics generally just beat on a impact socket to remove locks. this may cost you, so go back to the tire place and ask them to remove or replace them, it has happened.
  • cecelia brigham
    0 answer
  • chandelen
    chandelen - 1988 Mercury Grand Marquis - Preventive Maintenance - 9/12/2010
    My fuel gauge doesnt leave empty
    We just bought the car off of an old man and it works beautifully except for the fuel gauge not working. I was wondering if you could tell me what to look for. The gauge always reads empty and the low fuel light is always on.
    • HouseCallAuto
      9/12/2010 HouseCallAuto
      Replace the Fuel Level Sending Unit in the fuel tank. May as well replace the pump assembly also while you are there.
  • ptgarrett
    • Nissan Technical Advisor
      Clicking noises can also result from too much tappet clearance in a valve, or a hydraulic tappet is not working correctly.

      Visit a mechanic to check that sound.

      You can use the "Find a Shop" feature of AutoMD for shops nearest you.
  • Ruth
    Ruth - 1994 Mercury Grand Marquis - Preventive Maintenance - 8/21/2010
    What would beeb behind the dash while driving?
    0 answer
  • dennis welbourne
    dennis welbourne - 1996 Mercury Sable - Preventive Maintenance - 8/13/2010
    Location of the pcv valve on engine
    need to replace pcv valve cant locate it on engine
    • HouseCallAuto
      8/13/2010 HouseCallAuto
      If this is the DOHC 3.0 than the PCV valve is under the intake manifold. If the eighth digit of the VIN is an (S) than it is the DOHC 3.0 engine.
      10/31/2010 dennis welbourne
      I want to thank you for your reply i appreciate it much.
      thank you
  • mikensherri
    mikensherri - 1990 Mercury Colony Park - Preventive Maintenance - 8/8/2010
    I need to know how to put the fuel tank back up im having trouble its full of gas forgot to empty it had to drop it a li
    drop it a little to replace a gas line im stuped any suggestions
    0 answer
  • Ci
    • Blackwater
      8/3/2010 Blackwater
      Ok first, its never good to replace only one cat because chances are, the second/third will get busted soon, so you have to go back to your mechanic and do the job all over again (you will be paying thrice and your time for repairs will be wasted thrice as well)

      Replace both

      Since you said you are looking for a reasonable price, i can give you UNIVERSAL FIT cats, this means it has to welded or cut to fit.

      Bank 1 is usually on the left side if you are facing your car but sometimes its on the left, my tips is look which back is closest to you and that is your bank 1

      Let me rephrase my answer, your engine is horizontally placed so your bank 1 usually is the radiator side

      You have 3 cats by the way
      Radiator Side EAST82465
      Rear Under Car EAST70317
      Unfortunately we only have a direct fit cat for the rear firewall side DAV15650

      8/3/2010 kimberly
      Thank You so much for the prompt response...Im curious as to why the mechanic is giving a quote for parts at 997.75, for just the rear cat, I've seen the prices on your site and im just trying to figure out if im missing something here.
  • Deborah M Templeton
    Deborah M Templeton - 1980 Mercury Cougar - Preventive Maintenance - 7/15/2010
    MY VEHICLE 1964 MERCURY COMET (isnt listed) can you answer questions reguarding this Classis Automobile
    • Bobby
      7/15/2010 Bobby
      Best advice is to have the alternator rebuilt by a professional, there are some left that still rebuild alternators especially for classic vehicles you may have to ship it to them if you are not close to one. just do a google search for alternator rebuilding plus your zipcode you'd be surprised you might have one near you.
  • lenny
    lenny - 1994 Mercury Sable - Preventive Maintenance - 7/10/2010
    My air bag warning lite is flashing a 51 code. How do i fix.
    • HouseCallAuto
      7/10/2010 HouseCallAuto
      This code indicates a internal fuse has blown due to a short to ground in the firing circuit. But, this condition is no longer there. Inspect the front crash sensor harnesses for damage. Possible faulty clock spring. If the harness appears okay, recommend replacing the clock spring before installing another module, but the fuse may blow again if a unseen short should return.