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Grand Marquis

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Question
Gear shift lever?
Hello. The gear shift lever can become stuck in park for a variety of reasons. If one of the steering column components was not installed properly then that could be a possible reason as to why the vehicle is not...
Question
Car engine revs way up immediately upon starting engine.
Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid. If you request...
Question
Do the side lamps "wrap around"?
Hello. The only "wrap around" lights I can find for a Grand Marquis are the tail lights. This is where the tail lights extend into the trunk area. This may be what the specification refers to. In some vehicles different...
Question
Steering column
Hello there, adjusting, installing and working on your 1993 Mercury Grand Marquis is a delicate matter. The transmission linkage, and the gear selected cable are critical to the cars function and improper installation is a big problem. If you are...
Question
Serpentine belt, froze ac compressor
It is possible to bypass the compressor by removing the old compressor and installing a compressor bypass pulley. The pulley will bolt in the same location as the compressor. You may want to have the compressor pulley checked to see...
Question
Wondering how much it may cost to geta a vacuum leak fixed
A vacuum leak cannot be quoted if the vacuum leak location is not known. You will need to first have the vacuum leak verified and located then a quote for the repair can be made. Most vacuum leaks will cause...
Question
Car shakes while in idle and doesn't want to accelerate
The spark plugs are wet from trying to start the vehicle which is a good sign because this means that the motor is getting fuel. When the motor struggles to idle, this is generally a result of things like low...
Question
Car will not start after alternator replacement?
The backfire sound usually indicates a misfire of some kind which may be related to a timing issue such as a faulty ignition coil, bad spark plug wires or a faulty crankshaft position sensor. This may also possibly be related...
Question
No brake lights 1990 Mercury Grand Marquis
Hi there - check the fuses for the brake lights, the brake light bulbs, and the ground for the brake lights (should be OK since other lights work, but....). If these check out correctly, check for power to the brake...
Question
Why does my car stall when you press the gas and it tries to go faster than 20 mph? - 1988 Mercury Grand Marquis
Hello. You should start by looking into your vacuum and fuel supply. Both of these will have an adverse effect when pressing on the gas. There are several ways to test for a vacuum leak. The most efficient being with...
Question
2002 Grand Marquis rear suspension and tough steering
Hi there: If you have air suspension on your 2002 Grand Marquis, the issue might be mechanical as opposed to a sensor. To know for sure, you should have a professional mobile mechanic come to your home and complete a...
Question
Noisy frame bushing on the right side
Hey there. The upper and lower control arm or sway bar bushings along with the upper and lower ball joints are all common wear components on the front end causing this noise.. The front end would need to be lifted...
Question
Car overheats and radiator fan will not come on
Hey there. This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know, the coolant fan switch helps to maintain the proper coolant temperature...
Question
Engine erratic behavior, misfiring hard starting every now and then
Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...
Question
Parking brake dash light doesn't come on when using the actual parking brake so I failed inspection. I don't know if it's the bulb or parking brake.
Hello. The dash light not illuminating when the brake is applied is very likely a wiring issue. If you are knowledgeable with a voltmeter, you can pull a wiring diagram of the circuit and trace the issue. This is done...
Question
Car only goes in reverse
Hey there. This is something that is usually caused by low transmission fluid levels, a faulty transmission control module, or potentially burnt clutches inside the transmission. I would recommend having an expert from YourMechanic come to your location to diagnose...
Question
Car is not getting fuel. I changed fuel pump and checked the fuel pump relay. It was in good condition. What else could it be?
This may likely be related to the fuel pressure regulator. This is a unit that helps to maintain the fuel pressure in the system. When this is not working, this may cause an erratic fluctuation in the fuel pressure or...
Question
I have an overheating problem. Its not the fans! With the radiator cap off I can't really see the fluid flowing until I hit the gas.
Hi there - lets look at the behavior overall. Did you replace the clutch fan with electric fans because of an overheating issue? If so, that fundamental issue is likely still present. If temp rises quickly to overheat (matter of...
Question
I put my car in reverse and push the gas but my RPMs won't read
This may be a sign of low transmission fluid or a faulty transmission control solenoid. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a...
Question
When I try to accelerate it won't get up to speed and acts as if it's not getting enough gas. I changed my fuel filter and still nothing.
This sounds like you may be having a fuel delivery problem which us usually a result of the motor starving for fuel causing a lack of acceleration as you describe. This may be can be caused by many different things...

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