Question about 1992 Mercury Grand Marquis

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I have a 92 mercury grand marquie.It ran great all up until a couple of weeks ago.I parked the car with a 1/2 tank of gas.When I started it up 4 days later it ran rough and has since.I tried dry gas and filled it up with fresh gas but it still runs rough.Just it sounds like it might be running on only 7 cylinders????

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Have you replaced the Fuel Filter Yet?

Posted on Jan 28, 2009

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Same old things....check for a vacuum line off or leaking and I hope no one has switched your spark plug wiring on you.Could be a coil pack going bad,too.Run the codes on it,if no vacuum leak. don-ohio

Posted on Oct 02, 2011

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I parked the vehicle THREE YEARS ago it in perfic condition.


Your seals probably dry rotted and failed. After that long parked and not running, you will probably experience quite a few problems. Cars need to be ran around a couple times a month to keep stuff working and not dry rot or collect corrosion from being exposed to the elements and temperature/humidity changes.

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It may be the battery is going dead. try putting a jump box or jumper cables and try again. good luck

Dec 07, 2013 | 1998 Mercury Grand Marquis

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Does it not start or not crank ?
If it does not start, you will need to figure out if it is a lack of fuel to the injectors or lack of spark to the plugs to proceed.

Jul 29, 2012 | 2002 Mercury Grand Marquis

1 Answer

Car has been parked 4 years


any time a car has been parked for a long time there are things that need adjusting sometimes before it starts, fresh gas, check fuel lines and filters-may be clogged, carb adjustment, new spark plugs and cables. All of this stuff will cost you about $200

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I have a 98' Grand Marquis with a 4.6 engine. as


have the alternator checked. if the alternator is not charging the vehicle is only supplied with what power is stored in the battery. once the battery is dead there is nothing to charge it

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