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Mercury engine repair questions and answers

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  • Richard
    Richard - 2003 Mercury Grand Marquis - Engine - 1/17/2015
    Car turns over but will not start when it's cold outside, but it starts fine when it warms up.
    I can use starter fluid to get it to start when it's cold and it runs fine once cranked.
     
    • alex
      1/17/2015 alex
      i would change the collant temp switch their is two one to run the gauge the other to tell the ecu what temp it is replace the one for the ecu.
  • Richard
    Richard - 2003 Mercury Grand Marquis - Engine - 1/17/2015
    Car wont start when it's cold outside.
    car turns over when it's cold, but won't start. I can use starter fluid to crank it and it runs fine once it warms up.
     
    0 answer
  • mary
    mary - 1997 Mercury Grand Marquis - Engine - 1/17/2015
    Check engine light is coming on same time battery light, oil light and ABS light, white smoke coming out.
    I replaced battery 10 weeks ago.51,000 miles on it
     
    • Jimm
      1/17/2015 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.
      Have the check engine light tested / scanned for free - most local auto parts stores do this service for free.
  • beachrhodes
    beachrhodes - 2005 Mercury Monterey - Engine - 1/16/2015
    2004 Mercury Monterey randomly stalled and the oil light and battery light came on.
    I was pulling into the gas station today and suddenly my steering went stiff and I noticed that the car had just stalled out. The oil pressure light and the battery light came on when this happened. I restarted the car and the warning lights went off. This happened ...
     
    0 answer
  • beachrhodes
    beachrhodes - 2005 Mercury Monterey - Engine - 1/16/2015
    2004 Mercury Monterey randomly stalled and the oil light and battery light came on.
    I was pulling into the gas station today and suddenly my steering went stiff and I noticed that the car had just stalled out. The oil pressure light and the battery light came on when this happened. I restarted the car and the warning lights went off. This happened ...
     
    0 answer
  • Larry
    Larry - 2000 Mercury Villager - Engine - 1/3/2015
    Car has a rough idle and smooths out under acceleration and running speeds.
    A mechanics code reader discovered an injector problem in the rear bank of cylinders. An Auto Zone code reader discovered a bad knock sensor but did not find an injector issue. What is involved in making either of these repairs and how can we narrow down what ...
     
    • Ozzie
      1/2/2015 Ozzie
      Sounds like you have an intermittent Coil. Once in a while my car had a rough idle and as I build up speed it smooth out like if nothing was wrong. This will happen once in a while but I noticed that if I started my car with in minutes apart it would happen more often. Check your coils Pack resistance on every cylinder and if good they will all be within range. If not you have a bad coil. Let me know if this was helpful.
    • Jimm
      1/3/2015 Jimm
      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. 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.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • AutoMD Member
    AutoMD Member - 2004 Mercury Sable - Engine - 1/3/2015
    My check engine light is on, car stalls when idle, however it drives perfectly fine at highway speeds.
    Just had service done at the dealership. Replaced the air bypass valve and also the serpentine belt. Still having the same issue as when it was taken in. They also cleaned the throttle body. Had to travel 270 miles to get the car home. 40 miles into the trip ...
     
    • Ozzie
      1/3/2015 Ozzie
      What code did they say it had? PO300 Random Misfire on both banks is a intermittent Coil Misfire and it will show as PO301/305 for Coil #1, PO303/304 Coil #2 and 302/306 Coil #3 and this mostly happens at idle or when you try to pick up speed. These Coils come in pairs and if one goes bad it's the same as two going bad. To check them make sure your car is off and negative battery cable is disconnected. Unplug Coil pack electrical connector and Ignition Capacitor connector. On your Coil Connector you have 4 Pins.
      Pin#4 Battery Voltage, Pin#3 Coil 1, Pin#2 Coil 3, Pin#1 Coil 2. Now Measure Primary Resistance Pin#4 Battery Voltage to Pin#3 Coil #1. The Resistance should be 0.3 Ohm to 1 Ohm. on all pins to Battery Voltage Pin#4. Do the same to Pin#2 Coil 3 to Battery Voltage Pin# 4. Also Pin#1 Coil 2 to Battery Voltage Pin#4. If Resistance is out of specs Replace Coil. Now lets measure Secondary Resistance. So test Coil # 1 Spark Plug Tower 1 and 5 on Coil. They should measure 12.8 kilohms to 13.1 kilohms on all pair of towers. Do the same for Coil # 3 Spark Plug tower 2 and 6 on coil. Also measure Coil # 2 Spark Plug Tower 3 and 4 on coil. The measurement should be around the same if not you have a bad coil. Let me know how you make out.
    • Jimm
      1/3/2015 Jimm
      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. 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.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • Shmi770
    Shmi770 - 2003 Mercury Sable - Engine - 1/2/2015
    It won't start it cranks but won't start
    50k on it check engine light comes on and stays on when u crank but it won't start
     
    • Ozzie
      1/2/2015 Ozzie
      If the car cranks but does not start you should have a code. What is it? If you do not have a code you are not getting power to the Powertrain Computer Module (PCM) which in turn will give a crank signal to PCM and giving you a signal to Fuel Pump, Ignition Coil and Injectors so car would start.
  • Treyzers
    Treyzers - 1989 Mercury Grand Marquis - Engine - 1/2/2015
    How to bring life into my car?
    How do I bring my car back to life? Stroke it out? Idk. It has a 5.0l v8 less than 60k miles. What would cost less? A new engine or engine upgrades?
     
    • Ozzie
      1/2/2015 Ozzie
      Does it have any leaks or did it smoke? Do you have any issues with the motor or the trans. If the answer is no to these questions then it is OK to bring your car back to life. Now let's start by removing all Plugs and check for clean spark plugs with no black soot build up. This will tell you in what shape the engine is in by how the Plugs look. Now remove old Oi and oil Filter and check for any Anti Freeze in the oil. If everything looks good lets continue. Now lets replace the Anti Freeze we removed and hoses if needed. Replace the oil and Oil Filter if needed. Replace the Old Gas and old Fuel Filter if needed. Replace Transmission oil and filter if needed. Now lets give it a Tune-up which means new Plugs, new Wires, new PVC Valve and a new Air Filter. Make sure you have a fully Charged Battery Before you start your car. Check everything you have done and start your engine. How does it run? Let me know how you make out.
  • Josh8131
    Josh8131 - 1995 Mercury Grand Marquis - Engine - 1/2/2015
    Could My alternator be going??
    Hey all, I have a couple of real straight forward questions about symptoms of a possibly failing (or failed) alternator on my vehicle. This morning I went out to start the car and let it warm up a bit (I live in Minnesota and mornings are rather cold in winter). The ...
     
    • Jimm
      12/29/2014 Jimm
      Have the charging system tested - for free; any local auto parts stores. This is the first step.

      Check these various on-line vendors; www.autopartswarehouse.com, www.RockAuto.com, www.partsgeek.com, to list only a few. For example, they (RockAuto) list the alternator (remanufactured) from around $60.00 for your vehicle. Of course, this is only the alternator - depending on the repair shop, you may figure 0.5-0.75 hours labor, so at a rate of perhaps $100.00 per hour, either $50.00 to $75.00 for the installation.

      Check the installation steps; www.autoMD.com and the 'How-To-Guides' feature.

      The best time to obtain cost quotes - or inquire about an expense for any repair - is before the task is started.
      Jimm
      1/1/2015 Josh8131
      Thank you for your quick response! I really appreciate it! I took my battery to a local Napa Auto Parts location and had them run a condition and load test. Ultimatly the battery did fail the test. I purchased a replacement battery and installed it the same day. The vehicle started up perfectly, all internal and external lights were indeed much brighter but the voltage meter is still hanging barely above the bottom with the battery light illuminated on the dash board. could this be the alternat?
      Jimm
      1/1/2015 Josh8131
      alternator? (continuation of last reply) I also made sure there was no loose cables and there was proper tension on the belt and the alternator was spinning. being a broke college student my financial ability to have it professionally diagnosed is extremely limited. so I'm looking for simple ways to possibly trouble shoot charging issues. thank you so much Jimm!
    • Jimm
      1/2/2015 Jimm
      Have the charging system tested - for free; any local auto parts stores. This is the first step. The charging system performance test includes; the battery, alternator and associated wiring.

      There may be a loose / worn alternator drive belt or belt tensioner, among other possibilities.
  • AutoMD Member
    AutoMD Member - 2001 Mercury Grand Marquis - Engine - 12/30/2014
    Check engine light blinking and engine runs rough
    code readings are p0305, p0401, and p0402
     
    • Jimm
      12/30/2014 Jimm
      P0305 = Cylinder #5 misfire
      Possible Causes:

      Vacuum leak
      Defective fuel injector
      Defective ignition coil pack
      Insufficient compression
      Defective high tension wire or spark plug

      Possible Solutions:

      Repair vacuum leak
      Replace defective injector
      Replace defective ignition coil pack
      Replace burnt exhaust valve
      Replace defective high tension wire or spark plug

      P0401 = Insufficient EGR flow
      A code P0401 most likely means one or more of the following has happened:

      •The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
      •There is a blockage in the EGR (tube), most likely carbon buildup
      •The EGR valve is faulty
      •The EGR valve may not be opening due to a lack of vacuum

      Possible Solutions:
      In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit. To determine the exact cause, follow these steps first;

      •Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
      •Clean out the EGR valve and/or tubing to remove deposits
      •Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
      •Replace the DPFE sensor (with a good quality / OEM one)
      •Replace the EGR valve

      1. With the engine at operating temperature, take a hand-held vacuum pump and apply 1 pump of vacuum to the Exhaust Gas Recirculation (EGR) valve and the engine should stall instantly.

      2. If the engine does not stall, the EGR passages are likely restricted. To clean the passages, remove the plate on top of the intake manifold and clean the EGR passages. Once the passages are clean, the engine should stall instantly when the EGR valve is activated.

      3. It is not likely to be a bad EGR valve so do not buy one. the passages are clogged. 99% probability

      P0402 = Exhaust Gas Recirculation Flow Excessive Detected. Code P0402 indicates that the PCM senses too much amount of EGR.

      Possible Causes:

      Defective differential pressure feedback EGR (DPFE) sensor
      Defective EGR temperature sensor or circuit
      EGR valve stuck open

      Possible Solutions:

      Replace EGR temperature sensor
      Replace DPFE sensor
      Clean EGR passages to free stuck valve
      Replace EGR valve
  • ogeecheeman
    ogeecheeman - 1997 Mercury Sable - Engine - 12/29/2014
    Crank shaft bolt removal-counter clockwise or clockwise.
    I have a 3.0L VULCAN 12 Valve engine.engine rotates clockwise.The 3.0L Duratec 24 Valve dual overhead cam engine crank bolt is a left hand thread.
     
    0 answer
  • Treyzers
    Treyzers - 1989 Mercury Grand Marquis - Engine - 12/23/2014
    How to bring life into my car?
    How do I bring my car back to life? Stroke it out? Idk. It has a 5.0l v8 less than 60k miles. What would cost less? A new engine or engine upgrades?
     
    • Jimm
      12/23/2014 Jimm
      It depends - what is the ultimate use for the vehicle? How long will you keep it? These questions need to be answered first to determine any upgrades.

      What is wrong / any issues with the engine or performance at this time?
  • Isabelita
    Isabelita - 2005 Mercury Mariner - Engine - 12/19/2014
    Why does My car turn off when I set it on drive?
    I was driving for over an hour and I soon as I exit the freeway ramp my car started vibrating and it turn off...I try turning it on again and as soon as I set it on drive it turn off again...the engine, oil, and battery light go on on yhe dash board ... But only as ...
     
    • Teddy B
      12/19/2014 Teddy B
      Did you check for a failed battery or charging system?

      I would hope you have a local shop you go to several
      times a year for many years,need that before you have a problem

      No one knows what is wrong

      You have to test vehicles to find problems
      you can't guess at it
  • Gerald
    Gerald - 1993 Mercury Grand Marquis - Engine - 12/12/2014
    Car is idled up way to fast. When I hit the gas it hesitates and I hear a clapping noise in the intake.
    Changed the IAC,TPS,MAF,Coil Packs,Fuel Pump
     
    • Teddy B
      12/12/2014 Teddy B
      1993 first year for Mark V111 Modular Motor with intake runner solenoids

      Google that & read up

      Got ahead of yourself & threw too many parts at
      the unknown when all you needed was a failed solenoid