20 Most Recent 1998 Mercury Grand Marquis - Page 7 Questions & Answers

Here's how to replace and here's the part.

sounds like your egr valve to your exhaust may have carbon build up and either needs relaced or taken off and cleaned . they are bad about this.

you can call the dealer and have the car towed there,or there are locksmiths out there that have the equipment to read the computer in your car and cut you a new key with the chip in.They do this a repo auction houses alot.

Sounds like the voltage regulator in the alternator. Or the alternator is going out.

Assuming the car does not overheat (Ruling out the water pump), I would look for something not opening the heater door. I think this car uses a pneumatic system to open the door for the fan to blow air over the heater core. If that door does not open, you won't get any heat. You probably have a cracked or broken pnuematic line behind the dash that controls the door.

It likely is the place to start looking. Does the engine crank over but wont start, or nothing from the starter? If nothing, check for power on the small wire at the starter solenoid, when key is held in crank position. If no power, diagnose start wire from ignition switch to the starter solenoid. If power is at the small wire, but no starter action, recheck battery and starter connections, or have the starter tested.If the starter works, but car won't run, recheck for spark at the sparkplugs. Have the fuel pressure tested-pressure is critical for injectors to work. If you still can't find the problem, your car needs shop time for diagnosis.

yes it will remove vaccume line to egr if you can and egr will close if solenoid is attatched to egr then you have to replace egr valve

instrument panel fuse blown not at all any time,sometimes

there should be threads in the pump shaft

Should be number 13 which is a 15amp or number 15 which is a 10amp. These fuses are in the box under the driver side dash near the parking brake.

it seems to be on the heater hose where it connects to the heater or firewall. it's in line on the hose and has a vacuum line running to it. You can have a try.---------multi diag access

The problem can be that spark plugs wires broke loose inside the wire wrapping or they are resting against the motor

Pressure in the cooling system from somewhere. May be blown head gasket if it is bogging out on you.