On the 302 cu in 5.0L TBI engine as identified by the F as the 5th digit in a 13 digit VIN# or the 8th digit in a 17 digit VIN#, it is located next to the crankshaft pulley on the passenger side next to and above the vacuum pump bracket. First you will need to jack the car up. I placed a 1 1/2 inch thick concrete block under both wheels. You will need to remove the vacuum pump bracket and battery ground cable and wiring harness to make enough room to work. Using a 7/16 angled box wrench, remove the retainer clip on top, not the block the sensor is inside of.
Inserting the new sensor and retainer clip is tricky since it's hard to see the angle they go back in with. Total job took me over 3 hours. You should have better luck now.
next to the crank pulley
changed sterring column changed crank sensor and fuel pump
Check the ignition coil on the Marquis. Check the crank sensor as well. One of these is probably bad.
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 the transmission
Mercury Grand Marquis was created in 1983.
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 )
On a 1999 Mercury Grand Marquis : The Mass Air Flow Sensor should be between the engine air filter and the big engine air intake tube
On a 1996 Mercury Grand Marquis , 4.6 liter V8 engine : Bank 1 is the passenger side of the engine Sensor 2 would be AFTER the exhaust has passed through the catalytic converter
First check spark, if you have, then check the fuel pump for pressure.
where is the running light sensor on a 2003 grand marque