How do you check and replace fuel injectors, Fuel Pressure Regulator,Fuel Rail,Intake Manifold,Throttle Body and Throttle Position Sensor on a 5.0L engine on Mercury Grand Marquis?

The first step in removing the air intake plenum and throttle body on a 5.0L engine involves disconnecting the negative battery cable. Also, unplug electrical connectors at the air bypass valve, throttle position sensor, and EGR position sensor. Disconnect the accelerator cable and transmission linkage from the throttle body assembly, remove the accelerator cable/TV cable bracket from the intake manifold, and label and detach vacuum lines from the upper intake manifold vacuum tree, EGR valve, and fuel pressure regulator. Make sure to disconnect the PCV system or any canister purge line if it is present and also downsize the water pipes of spacer coolant lines for EGR. Unbolt six (6) upper manifold retaining bolts to separate the upper manifold and throttle body as an assembly from the lower manifold. Ensure the gasket is in place during installation, attach new gasket(s) onto lower intake mounting face, and snug up air intake plenum with throttle body assembly by using six (6) upper manifold retaining bolts right up to the recommended torque value.

Genuine Mercury Grand Marquis Throttle Position Sensor

TPS Switch

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

6 Throttle Position Sensors found

View related parts
Mercury Grand Marquis Potentiometer - Engine Throttle
Part Number: F4SZ-9B989-AA
$48.73 MSRP: $80.55
You Save: $31.82 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: F4SZ-9B989-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995-2004 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT, 4AT 4R70W, 4AT AODE
View related parts
Mercury Grand Marquis Potentiometer - Engine Throttle
Part Number: 6L2Z-9B989-D
$86.13 MSRP: $142.36
You Save: $56.23 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 3L5Z-9B989-AA, 6L2Z-9B989-B, 6L2Z-9B989-A, DY-1049
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Grand Marquis | 8 Cyl 4.6L, 8 Cyl 4.6L Romeo SOHC EFI | 4-Speed Automatic Transmission 4R75E Livonia, 4AT 4R70W, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Mercury Grand Marquis Potentiometer - Engine Throttle
Part Number: F4SZ-9B989-A
$48.73 MSRP: $80.55
You Save: $31.82 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: F4SZ-9B989-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995-2001 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT, 4AT 4R70W, 4AT AODE
View related parts
Mercury Grand Marquis Potentiometer - Engine Throttle
Part Number: F2AZ-9B989-A
$32.49 MSRP: $51.82
You Save: $19.33 (38%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: F2AZ-9B989-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1992-1994 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT, 4AT AOD, 4AT AODE
View related parts
Mercury Grand Marquis Potentiometer - Engine Throttle
Part Number: 3L5Z-9B989-AA
$86.13 MSRP: $142.36
You Save: $56.23 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: Kit includes screws and instruction sheet.
- Replaced by: 6L2Z-9B989-D
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT 4R70W
View related parts
Mercury Grand Marquis Potentiometer - Engine Throttle
Part Number: E6AZ-9B989-C
$37.06 MSRP: $73.64
You Save: $36.58 (50%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Throttle Position Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1990-1991 Mercury Grand Marquis | 8 Cyl 5.0L | 4AT AOD

Mercury Grand Marquis Throttle Position Sensor

Mercury Grand Marquis use Throttle Position Sensor, abbreviated as TPS, to regulate the air-fuel mixtures for combustion purposes. The Throttle Position Sensor records the position of the throttle and sends the signals to the fuel injection system, letting the vehicle's computer to control the flow of fuel proportional to the power output of the engine. It can happen several times per second, which helps maintain proper acceleration, speed changes, as well as slowness. Year models of Mercury Grand Marquis have used different types of Throttle Position Sensor such as the Hall effect, inductive, and magnetoresistive type of non-contact sensor. These modern sensors are dissimilar to previous types that were potentiometric in nature; the former uses contact and change in resistance. The non-contact Throttle Position Sensor increases reliability and performance because it works without wearing from the moving component; which in turn optimizes the general performance of the Grand Marquis's electronic throttle control system.

We provide a wide range of Mercury Grand Marquis Throttle Position Sensor at the best prices possible. If you need Mercury Grand Marquis Throttle Position Sensor, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Mercury Grand Marquis Throttle Position Sensor Parts Questions & Experts Answers

Potentiometer - Engine Throttle
F2AZ-9B989-A
Q: How do you check and replace fuel injectors, Fuel Pressure Regulator,Fuel Rail,Intake Manifold,Throttle Body and Throttle Position Sensor on a 5.0L engine on Mercury Grand Marquis?
A: The first step in removing the air intake plenum and throttle body on a 5.0L engine involves disconnecting the negative battery cable. Also, unplug electrical connectors at the air bypass valve, throttle position sensor, and EGR position sensor. Disconnect the Accelerator Cable and transmission linkage from the throttle body assembly, remove the accelerator cable/TV cable bracket from the intake manifold, and label and detach vacuum lines from the upper intake manifold vacuum tree, EGR valve, and fuel pressure regulator. Make sure to disconnect the PCV system or any canister purge line if it is present and also downsize the water pipes of spacer coolant lines for EGR. Unbolt six (6) upper manifold retaining bolts to separate the upper manifold and throttle body as an assembly from the lower manifold. Ensure the gasket is in place during installation, attach new gasket(s) onto lower intake mounting face, and snug up air intake plenum with throttle body assembly by using six (6) upper manifold retaining bolts right up to the recommended torque value.