A bad fuel pump can cause a myriad of problems for your Mercury Grand Marquis, making it essential to be aware of the warning signs that indicate trouble. Your fuel pump is responsible for pushing fuel from your car’s fuel tank to the engine, but when it starts to fail, your engine may suffer run … Read more
A bad alternator can leave your Mercury Grand Marquis without power and unable to move. Alternators don’t always go bad in the exact same way. We’ll cover the symptoms of when an alternator goes bad, and how to diagnose a bad one (which is really pretty easy). How Your Grand Marquis’s Alternator Works The … Read more
A bad fuel filter is one of the worst problems that can happen to your Mercury Grand Marquis. When the filter fails, it can limit the amount of fuel that enters the engine. Without proper fuel pressure, your car will not run at all. With that in mind, most of the symptoms of a bad fuel … Read more
An engine functions as a pump, requiring a precise combination of fuel, air, and spark. If any element of this trio is imbalanced, your Mercury Grand Marquis won’t run right (or at all). While a misfire is the symptom of bad spark plugs, bad spark plugs almost always indicate a problem with the engine (more … Read more
Oxygen sensors play a crucial role in your Mercury Grand Marquis’s emissions system and fuel management. These sensors detect the levels of oxygen present in the exhaust, which is a primary component in maintaining the optimal air-fuel ratio. A damaged or faulty oxygen sensor can have a significant impact on your car’s overall performance, making … Read more
One of the most serious issues that can happen to your Mercury Grand Marquis‘s engine is if it ends up with low oil pressure. Low oil pressure will cause the engine to seize up. When the oil pressure light on, it should be assumed that the engine locking up is imminent. We advise not running … Read more
One of the most common (and) critical major engine problems is a blown head gasket. If your Mercury Grand Marquis has blown a head gasket, you may find it running poorly or not at all. Below you’ll find the symptoms, causes, and price of a Mercury Grand Marquis head gasket. Recognizing the signs of a blown head gasket … Read more
Your Mercury Grand Marquis leaves the factory with a catalytic converter. It can run into problems over the normal life of the vehicle, and is often accompanied by OBDII code P0420. Below we’ll cover the location, price, and symptoms of a bad torque converter in your Grand Marquis. Menu: Catalytic Converter Price Grand Marquis … Read more
One of the most common issues with any vehicle, including the Mercury Grand Marquis, is when it has fuel pressure regulator issues. A bad fuel pressure regulator can cause all sorts of problems. A bad fuel pressure regulator can cause various symptoms in your Mercury Grand Marquis, the most common being engine performance problems. This can result from … Read more
If you find your Mercury Grand Marquis‘s steering wheel shakes or vibrates when you press the brakes, it is almost always the brake rotors that are the cause of the problem. There are plenty of other issues that can cause the steering wheel to wobble. But, if your Grand Marquis is only shaking when … Read more