Try running the engine to get the manifold hot, then try to have at it. You also might need to use PB Blaster or equivalent to get it unstuck. Make sure that there aren't any parts involved that the PB Blaster would eat away at.
The 2003 Mercury Grand Marquis came equipped with the 4. 6L V8. Oxygen (O2) sensor locations are upstream and downstream (before and after the catalytic converters).
On a 1998 Mercury Grand Marquis : Bank 2 is the drivers side of the engine Sensor 1 would be in the exhaust close to the engine before the exhaust enters the catalytic converter ( upstream sensor )
remove radio from a grand marquis 2003
there one on right-its on the side after the cat there's one on the headers right lower side
How many o 2 sensors on a 2001 grand marquis
There are four oxygen sensors screwed into the converter assemblies. You need to know which one is faulty before attempting to replace them.
Location of coolant temperature sensor on a 2003 Mercury Grand Marquis?Read more: Location_of_coolant_temperature_sensor_on_a_2003_Mercury_Grand_Marquis
On a 1997 Mercury Grand Marquis : Bank 2 is the drivers side of the engine and ------------------------------------------------------------------------------------------ Sensor 1 would be close to the engine before the exhaust enters the catalytic converter Sensor 2 would be AFTER the exhaust has passed through the catalytic converter ( also called a catalyst monitor )
To remove the heater core on a 1992 Grand Marquis, first remove the dash board. Then remove the AC box to have access to the heater core.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Mercury Grand Marquis
Bank 2 is the drivers side of your engine , Sensor 1 is in the exhaust before the catalytic converter ( upstream )
i have a 95 mercury grand marquis how do i remove the passtime device You should NOT unless you paid off the car. the dealership will then remove it.