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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
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
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
Car wont start and the battery is great.
Hi there. Check the throttle position sensor on the throttle body and see if the sensor is working properly. The sensor is common to fail and cause the engine to not restart. I recommend replacing the throttle position sensor and...
Question
What is this part called ?
The round disc you see is just a rubber plug that covers the access port to the transmission torque converter drain plug. If you are leaking oil from this location you will need to first see if it is engine...
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
Rear End Differential Fluid
You should only have the differential serviced when you have a leak on the rear cover or an axle seal has leaked and needs replaced. The gear lube should not need replacement unless a problem is present.
Question
Vehicles Check Engine light blinks and then stays on, runs rough like on 6 cylinders/misfiring when wet.
Hi there. Check the spark plugs and see if they are sparking. Get a code reader and check for any codes that could be stored in the computer as the check engine light is on. The code will give you...
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
I have a 2000 Grand Marquis my girl crashed up the front end so I need some aftermarket body parts.
Billing question sent to CS for the cost of aftermarket parts to repair the front end after a crash.
Question
Temperature gauge does not work - 1998 Mercury Grand Marquis
You will need to test the computer to scan for data of the temperature sensor to see if the computer is reading the correct temperature as tested externally on the coolant sensor. If the sensor is not accurate then replace...
Question
Would I have to completely replace the the pcm and pats system to replace the transceiver behind the key?
All you have to do is go to the dealer and have them reprogram the PATS system to work with the new keys. This will be a lot less to get done than what all the replacement parts will cost...
Question
Transmission problem
Of course, be sure the transmission fluid level is correct, the fluid is not contaminated and the filter is not clogged. A fault like the one you are describing is likely to be due to a hydraulic control issue. If...
Question
Low oil pressure noise some noise front of the engine 2001 Mercury Grand Marquis
Hello - yes, low oil pressure and high miles can certainly product a metallic clattering from the timing chain set, as well as knocking noises from worn connecting rod bearings and crankshaft main bearings. If you are getting low oil...
Question
Runs rough and misfires
Hello. The trigger system that your codes may be referring to could be the crankshaft or camshaft position sensors. Many engine management systems use these signals as a trigger point for their ignition systems. It could be possible that there...
Question
Racing engine
The idle may be high due to a vacuum leak at the pcv hose where it connects to the back of the intake manifold. It gets a hole in it causing a large vacuum leak. The hole may change in...

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