Question about Mercury Grand Marquis

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WHAT MAKES MY MERCURY GRANDMARQUE SOUND LIKE VALVES RATTELING ? It made this sound in the old engine, know that i have installed a new engine, it's doing the same thing.

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  • Mercury Master
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COULD BE WRONG OIL VISCOSITY.OIL COULD NEED CHANGING.COULD HAVE ENGINE DETONATION DUE TO WRONG OCTANE GAS.IF ALL LOOKS GOOD TAKE VECHICLE BACK TO DEALERSHIP NEW ENGINE HAS WARRANTY YOU ARE COVERED.

Posted on Nov 12, 2010

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Posted on Jan 02, 2017

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My engine makes a whomp whomp whomp sound when under load and particularly when accelerating. I'm trying to find out what the cause of the noise is. Is it a vacuum issue? A valve issue? Mounts?


Sounds like the Throttle position sensor is activating the Rev. Limiter. Take the vehicle back to the shop that did the head work and request an OBDII scan. Get a print out of the stored fault history. Let the print out be your guide to any repairs. The Mercury is to new, to need head work, unless severe overheating occurred.

May 19, 2017 | Mercury Cars & Trucks

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My engine is tapping near the rear valve cover sounds like a broken spring, i need to know what i have to do to investigate the problem


if it was mine i would go to a car parts store and get a new valve cover gasket. then i would pull the valve cover off and see what is making the noise. if i saw nothing obviously broken i would clean the old gasket and surfaces off, put the new gasket on and reassemble. you could have a sticky lifter, most likely can be driven with no harm for a long time. if there is a broken spring then a deeper level of mechanical repair needed and a repair shop is the place to take it. head is most likely going to have to come off.

Aug 25, 2011 | Mercury Villager Cars & Trucks

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Engine idiles high and stalls when stoped every now and then


Sounds like a sticking EGR valve or partially open, try removing vacumm hose at valve and plug vacumm line, if no results remove valve and make a gasket of a soda can to match outter edge but no center holes install if fixes you need a new EGR valve

Dec 05, 2010 | 1991 Mercury Grand Marquis

1 Answer

EGR VALVE 1999 MERCURY COUGER


SECTION 303-08: Engine Emission Control 1999 Cougar Workshop Manual REMOVAL AND INSTALLATION Exhaust Gas Recirculation (EGR) Valve Removal
  1. Remove the air cleaner outlet tube.
    1. Disconnect the intake air bypass hose.
    1. Disconnect the positive crankcase ventilation hoses.
    1. Remove the air cleaner outlet tube.
  1. Disconnect the tube from the exhaust gas recirculation valve.
  1. Remove the exhaust gas recirculation valve.
    • Disconnect the vacuum hose.
Installation
  1. sxu~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: When cleaning the gasket faces, do not allow debris to enter the intake manifold or exhaust gas recirculation valve.
    Clean the gasket faces of the intake manifold and exhaust gas recirculation valve.
  1. Install a new exhaust gas recirculation valve gasket.
  1. Position the EGR valve and install the bolts.
    • Install the vacuum hose.
  1. Connect the EGR tube.
  1. Install the idle air control valve. For additional information, refer to Section 303-14A . For additional information, refer to Section 303-14B .

Sep 15, 2009 | 1999 Mercury Cougar

1 Answer

AT START UP THE ENGINE RATTELS FOR ABOUT 3 OR 4 SECONDS LIKE THERE IS NO OIL PRESSURE


This might be as simple as an oil filter draining down and delaying oil pressure during cold starts.Recomend usage of Nissan factory filters as theirs has a built in check valve to minimize bleed down.Also recomend oil no thicker than 5W30. You may be also faced with a hydralic lash adjuster bleeding down causing momentarily loose clearance in the valve rocker assembly. This particular ratlle would be half of crankshaft speed which would indicate upper end rattle.

Jul 19, 2009 | 1995 Nissan Maxima

1 Answer

Need help in bleeding brakes on 92


Always start with the wheel furthest from the master cylinder. Have someone sit behind wheel and pump the brake pedal 5 times and hold the fifth pump to the floor. The other person, while the pedal is still held to the floor, opens the bleeder valve and releases all fluid and air and closes the valve. Then and only then does the person behind the wheel release the brake pedal. Repeat this process at each wheel until no sign of air bubbles are present in the fluid. Then move to the next closest wheel to the master cylinder. Be sure to periodically check and refill the brake fluid in the master cylinder. Good luck!

Apr 18, 2009 | 2003 Mercury Grand Marquis

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