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Mercury engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 1998 Mercury Tracer - Engine - 7/20/2014
    Why does 1998 Mercury Tracer have trouble starting when engine is hot?
    The 1998 Mercury Tracer (manual transmission) has 110,000 miles on it. The car belonged to my dad (he bought it brand new), and he took good care of it. He gave the car to me. For the past few months, this problem occurs regularly. Even when gas tank is full. ...
    0 answer
  • AutoMD Member
    AutoMD Member - 1993 Mercury Tracer - Engine - 7/18/2014
    Why does car turn off when I brake
    When I start car it does an idle surge and act like it want to turn off. I press the gas and it drive just fine but when I brake it start to do the idle surge again if I leave my foot on the brake more then 1 min. or more the car turn off . Odo- 38334 Work ...
    0 answer
  • AutoMD Member
    AutoMD Member - 1997 Mercury Sable - Engine - 7/7/2014
    Loss of power on acceleration and jerking whem cruising
    My car started acting up last weekend after sitting for 2 or 3 days without being driven. The engine seems to sputter and bog down when accelerating, but the rpms are at normal levels; just a lack of power. At crusing speed, the car will also hace a jerking motion, ...
    • AutoMD Member
      7/7/2014 AutoMD Member
      Not answering...just confirming that my 2004 Mercury Sable is doing the exact same thing! Taking it in tomorrow. Will let you know. I have a question for you...does your car ever smell like old wet grass clippings??
  • AutoMD Member
    AutoMD Member - 1997 Mercury Sable - Engine - 7/7/2014
    Loss of power on acceleration and jerking whem cruising
    My car started acting up last weekend after sitting for 2 or 3 days without being driven. The engine seems to sputter and bog down when accelerating, but the rpms are at normal levels; just a lack of power. At crusing speed, the car will also hace a jerking motion, ...
    0 answer
  • brad
    brad - 2006 Mercury Mariner - Engine - 6/25/2014
    Driving in the highway when I put on the air conditioning, the danger light comes on, and the car has to be stopped.
    It runs fine without the A. C. But at a high speed, I can't put the air on. A triangle lights up and says to stop the car immediately . Then it will restart like nothing.
    0 answer
  • AutoMD Member
    AutoMD Member - 2004 Mercury Sable - Engine - 6/25/2014
    What is wrong with my sable when it makes a rattling sound on acceleration?
    120,000 millage
    0 answer
  • AutoMD Member
    AutoMD Member - 2007 Mercury Mariner - Engine - 6/20/2014
    Why am I only getting 18-19 mpg with my 2007 mercury mariner hybrid
    I am getting really bad mpg. Runs fine, no engine lights are on. Took it to dealer, no codes are coming up. 70000 miles
    0 answer
  • AutoMD Member
    AutoMD Member - 2004 Mercury Sable - Engine - 6/17/2014
    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 ...
    0 answer
  • saubstory
    saubstory - 1994 Mercury Villager - Engine - 6/10/2014
    While driving engine sputters?
    Under light or heavy throttle engine sputtered like no fuel then fuel, never has died. Check engine light comes on then.
    0 answer
  • Peter
    Peter - 1997 Mercury Grand Marquis - Engine - 6/10/2014
    Fuel pump or throttle body car idles fine but no power when foot feed is pressed.
    I have a ’97 Mercury grand marc. With a 4.6 it has 118,500 miles. I was driving it the a while back and suddenly drop from 65 mph down to about 25-30 mph without changing the foot feed, I limped along for 3-4 miles then it drove fine again for about 5 miles and it ...
    • GT500Knights
      6/10/2014 GT500Knights
      Is the check engine light on? Get the codes pulled and research what you find.

      But, based on what you're explaining, it seems to me you may have a large exhaust restriction. Idle will be fine since back pressure is low....but as you open up the throttle, the engine needs to suck in more air to operate correctly. If not enough air can escape out the exhaust, not enough will be able to get in; this causes a substantial rise in back pressure and will retain a large portion of exhaust gasses within the combustion chamber, throwing off the fuel mixture for proper combustion. Places to check for exhaust back pressure would be catalytic converter(s) and muffler.

      Improper fuel pressure can cause this sort of issue, but if the fuel pressure was out of spec then your idle would be affected as well. Now, the volume of fuel not changing would be due to a fuel pressure regulator and/or fuel filter. Not enough volume but high enough pressure is possible. More fuel is needed when the throttle is pressed in.

      Throttle position sensor (TPS) and manifold absolute pressure (MAP) sensors can also cause the problems you're describing. If the computer cannot determine the throttle angle of your foot on the pedal, then it will be unable to compensate for additional fuel needed to be injected. More air will be allowed into the combustion chamber due to throttle plate opening further, but since the computer doesn't know how far the throttle is pressed, fuel injector pulse width will not change. The fuel mixture will go too lean and proper combustion will not occur, resulting in the sputtering and dying. The MAP sensor detects engine load. It determines the difference between barometric pressure and intake manifold pressure/vacuum. Likewise, if the map sensor isn't functioning properly, the computer will be unable to properly calculate engine load and will not adjust fuel injector pulse width, and usually spark advance.
  • Chell Thomas
    Chell Thomas - 2001 Mercury Villager - Engine - 6/4/2014
    Hi...My van drives a little then it dies but cranks back up can some please tell me what this problem may be.
    It was running just fine but after I went on a trip to Miami and came back to Alabama it rode a few day they it just cut off then it wouldn't crank went back at it the next day it cranked but still cut off after a short ride I have changed sparkplugs distributor and ...
    • jdl
      6/4/2014 jdl
      Does it stall at idle or highway speed, both? I would give it a tune-up. An intermittent rpm signal can drive you crazy. That signal should come from the crank sensor. The 02 sensor is part of a tune-up. The 02 code should tell you which 02 sensor. With those sensors, I can't rule out a connector or wiring circuit problem.
      6/4/2014 Chell Thomas
      Before I bought it it sat up for like 3 years I did nothing to it
      Before taking the trip to Miami and this started a couple days
      After I got back in town. It stats to slows and just cuts off but while its running it runs good then after a good mile or so it cuts off the mechanic wants to replace the knock
      Sensor because he say that's what's came up on his computer
      But I don't want to waste money and that's not the problem
      After 3 years and no tune up before the trip could it really be
      6/5/2014 jdl
      Yes, the knock sensor could cause problems. I realize that isn't the definitive answer you wanted, but, I'm just talking to you over the internet, I can't see a thing from here.

      I understand about money and not wanting to throw parts at it.
      6/5/2014 Chell Thomas
      Yes it does stall when you get ready to crank like it don't
      Want to . and it seem like it idle down then shuts off or sometimes
      It catches it self before cutting off
  • AutoMD Member
    AutoMD Member - 2002 Mercury Grand Marquis - Engine - 6/2/2014
    It keeps getting hot
    i changed the thermostat and water pump still does it
    0 answer
  • marty
    marty - 1998 Mercury Mystique - Engine - 6/1/2014
    Why does engine die when I step on gas?
    I got engine codes p1504, p1121, p1130, and p1131 I replaced throttle position semsor, idle air control valve, mass air transfer unit, because it would hesitate really bad taking off from stop sign or accelerating on road, now it dies when I give it any gas after ...
    0 answer
  • AutoMD Member
    AutoMD Member - 2000 Mercury Sable - Engine - 5/26/2014
    Have had problems with what sounds like "missing" or beginning to stall.
    Going at speed usually can't hear the missing sound, but slowing and at idle it begins. have had it to shop twice. Coil was changed and connections checked. All seems ok for awhile then it starts "missing" again. Is this part of the Idle air bypass valve??
    • Jimm
      5/26/2014 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 - 2001 Mercury Sable - Engine - 5/16/2014
    Price of repair ???????
    I had a wate pump break, I had it repaced and more things were added to the job.When I recieved tje bill it was for 545 hundred Could this be acurated. and right. ?????
    • Jimm
      5/16/2014 Jimm
      No way to accurately compare the repair bill without these details; what parts were replaced? What exactly were the labor charges? The bill should be broken down and detailed - do not pay any repair charges without knowing exactly (and upfront of any repairs performed) what you are paying for.

      The best way to determine if you have been overcharged for any repair is to obtain repair estimates from different repair shops. Use the 'Estimate Cost' and Find-A-Shop' features on the AutoMD website.
    • Jimm
      5/16/2014 Jimm
      Not sure what all the various parts were replaced - the water pump itself is only around $25.00 for your vehicle (this price also includes the gasket). The parts are readily available from these many on-line sources,,,,, - to list only a few possibilities.

      Unless the replacement parts listing is extensive for the recent work that was completed - there should be no way any repair shop should charge over $500.00 for a simple water pump replacement.
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