20 Most Recent 2000 Mercury Grand Marquis Questions & Answers

Jack up the vehicle under the trunk you will see a cover with hoses coming out on its side the vent valve is under that cover /////the nuts and bolts will be severely rusted and don't try to open till you have replacements for them otherwise you willl not be able to reattach the cover you're going to need liquid wrench the new bolts and nuts long needle nose pliers also long vise grips angled needle nose pliers a long strong screw driver flat blade a 3/8 drive or 1/2 drive socket set a breaker bar in the drive your using , you'll need the long screw driver to wedge or the pliers to hold onto the bolt heads for removal and assembly also use antiseize lube on the threads have fun this is a pain because of the rusted bolts but just be patient you ll get it done wear safety glasses for rust an dirt to stay out of your eyes and a bandana around your mouth and one for your head good luck stephen

2000 Mercury... | Answered on Jul 26, 2019

It's a tough one to pinpoint. Do an upper intake cleaning and clean the idle air bypass valve. Also clean the mass air flow sensors carefully.

2000 Mercury... | Answered on May 09, 2019

This would require the use of advanced diagnostic software to determine where the ECM is setting the timing.

2000 Mercury... | Answered on Jan 22, 2018

How about the rear stabilizer bars?

2000 Mercury... | Answered on Jan 03, 2018

Should be a switch on dash with image of a tire.

2000 Mercury... | Answered on Jan 03, 2018

have you check cooling fan/radiator fan is working at right temperature? Did you check coolant level?

2000 Mercury... | Answered on Dec 28, 2017

B1318 Battery Voltage Low Air suspension module REFER to Section 414-00 . B1318 Battery Voltage Low LCM REFER to Section 414-00 . B1318 Battery Voltage Low NGVM REFER to Section 414-00 . B1318 Battery Voltage Low RCM REFER to Section 414-00 .
Control module problem , your best bet , take it to a qualified repair shop.

2000 Mercury... | Answered on Dec 26, 2017

you have a windshield problem have it check out

2000 Mercury... | Answered on Dec 15, 2017

-Speed sensor is bad. Check and replace it.

Good luck and drive slow until it fixed.


2000 Mercury... | Answered on Dec 06, 2017

Sounds more like a control valve is not working correctly.. probably stuck in one position because you should always have heat from your heater core...like when you chose fresh air or recirculated air...it switches a valve to allow the change...well from cold to heat there's a valve also that switches the vent inside dashboard

2000 Mercury... | Answered on Oct 05, 2017

If you have a warranty, take it back and tell them to fix it. Right now, it's worthless. You paid to have it fixed. Why would you pay and then dump it?

2000 Mercury... | Answered on Jun 29, 2017

You need to take some soap and put it in a spray bottle and be sure the system is charged and run the system and look for the leak. It works real well for finding leaks. Did you check the Schrader valves to be sure the leak was not there or a rub place on the bottom of one of the lines.

2000 Mercury... | Answered on Jun 24, 2017

Heat light switch went bad or body control module.

2000 Mercury... | Answered on Jun 23, 2017

Hello Steve,

From your post, "Finally had enough and stuffed a small block of wood between the driver's side bottom of the molded plastic linkage frame enough to lift the whole thing enough to put a moderate amount of pressure behind the wiper blade..", it sounds like this box is warped or somehow out of alignment. Is it possible for you to buy this box from a wrecking yard? Has you car ever been in a collision? If so the frame may have so un-repaired buckling resulting in the misalignment.

2000 Mercury... | Answered on May 22, 2017

Sounds like a bad IAC valve. This will throw no codes and will also pass a smoke test.

2000 Mercury... | Answered on May 21, 2017

Power Window assemblY Needs replacing. I've had to replace my driver side assembly a few times over the years in my 97 accord after a wreck on that side. Something doesn't line up right anymore and it eventually causes it to wear out. Steel cable and plastic parts don't work real well together over time- that plastic can wear out. Tricky part can be getting the door panel off. From there it can be pretty straight forward. May need an extra set of hands to get the window just right to attach to the bracket on the regulator assembly. May find some useful videos online, even if it's for a different car it can give you a good idea.

2000 Mercury... | Answered on Mar 31, 2017

Voltage drop test the electrical circuit , do know how to do automotive electrical testing . Lose connection , resistance in the circuit , lose ground Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia Testing Electric Fuel Pump Problems with Voltage Drop Test

2000 Mercury... | Answered on Feb 27, 2017

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