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 Fuel Rail

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9 Fuel Rails found

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Mercury Grand Marquis Fuel Rail
Part Number: 5W7Z-9F792-AC
$310.75 MSRP: $458.33
You Save: $147.58 (33%)
ADD TO CART
Product Specifications
- Other Name: Manifold Assembly - Fuel Supply
- Replaces: 5W7Z-9F792-AA
- 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 Fuel Supply Manifold Assembly
Part Number: 5W7Z-9F792-AA
$310.75 MSRP: $458.33
You Save: $147.58 (33%)
ADD TO CART
Product Specifications
- Other Name: Manifold Assembly - Fuel Supply
- Replaced by: 5W7Z-9F792-AC
- 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 Fuel Supply Manifold Assembly
Part Number: F1AZ-9F792-AB
$1835.68 MSRP: $2731.67
You Save: $895.99 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Assy - Fuel Supply
- Replaces: E9AZ-9F792-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1986-1991 Mercury Grand Marquis | 8 Cyl 5.0L | 4AT AOD
View related parts
Mercury Grand Marquis Fuel Manifold Assembly
Part Number: E9AZ-9F792-A
$1835.68 MSRP: $2731.67
You Save: $895.99 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Assembly - Fuel
- Replaced by: F1AZ-9F792-AB
- 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
- 1986-1988 Mercury Grand Marquis | 8 Cyl 5.0L | 4AT AOD
View related parts
Mercury Grand Marquis Fuel Supply Manifold Assembly
Part Number: 4W7Z-9F792-AA
$0.00
Product Specifications
- Other Name: Manifold Assembly - Fuel ; Manifold Assy - Fuel Supply; Fuel Rail
- Manufacturer Note: FROM 12-01-03
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT 4R70W
View related parts
Mercury Grand Marquis Fuel Supply Manifold Assembly
Part Number: 1W7Z-9F792-AA
Product Specifications
- Other Name: Manifold Assembly - Fuel ; Manifold Assy - Fuel Supply; Fuel Rail
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2002 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT 4R70W
View related parts
Mercury Grand Marquis Fuel Supply Manifold Assembly
Part Number: 3W3Z-9F792-CA
Product Specifications
- Other Name: Manifold Assy - Fuel Supply
- Manufacturer Note: 4V, Marauder
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT 4R70W
View related parts
Mercury Grand Marquis Fuel Supply Manifold Assembly
Part Number: 3W3Z-9F792-CB
Product Specifications
- Other Name: Manifold Assy - Fuel Supply
- Manufacturer Note: 4V, Marauder.
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2006 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT 4R70W
View related parts
Mercury Grand Marquis Fuel Supply Manifold Assembly
Part Number: XW1Z-9F792-AA
Product Specifications
- Other Name: Manifold Assembly - Fuel ; Manifold Assy - Fuel Supply; Fuel Rail
- Manufacturer Note: Includes fuel pressure regulator
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2000 Mercury Grand Marquis | 8 Cyl 4.6L | 4AT 4R70W

Mercury Grand Marquis Fuel Rail Parts Questions & Experts Answers

Fuel Supply Manifold Assembly
F1AZ-9F792-AB
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.