Tune Up And Torque Specifications 1991-1994 3.0L Ford Ranger

Here you'll find the essentials to tune-up your 1991, 1992, 1993, or 1994 3.0L Ford Ranger. You'll also find the cylinder head, intake manifold, and intake plenum manifold torque and tightening sequence specifications.

Ignition System Specifications

1994 was the last year model that the 3.0L V6 Ford Ranger used a mechanical distributor.

1991-1994: Spark Plug Cable Resistance
Ranger	7K (7000) Ohms for each 30 cm.

1991-1994: Spark Plug Air Gap
Ranger	0.042-0.046 inches (1.07-1.17 MM).

1991-1994: Base Ignition Timing
Ranger	10° BTDC (before top dead center). NOTE: The inline SPOUT connector must be disconnected.

1991-1994: Original Equipment Spark Plug
Spark Plug	Motorcraft AWSF-32P (OE) Motorcraft SP413 (supercedes AWSF-32P)

You can find the 1993-1994 3.0L Ford Ranger fuel pump circuit diagram here: 1992-1994 3.0L Ford Ranger Ignition Control Module Wiring Diagram.

Fuel System Specifications

1991-1994 3.0L V6 Ford Rangers use the EEC-IV electronic fuel injection system. This system uses a fuel injection computer with 60 pins.

Fuel pump is inside the gasoline tank.

1991-1994: Fuel Pressure With Key On Engine Off
Ranger	35-40 PSI (2.5-2.8 Kg/cm²).
Fuel Pressure With Key On Engine Running
Ranger	30-45 PSI (2.1-3.2 Kg/cm²).

1991-1994: Fuel Injector Resistance
Ranger	15-18 Ohms (individual resistance).

Location Of The Fuel Pump Inertia Switch
Ranger	Passenger side, beneath glove box.

You can find the 1993-1994 3.0L Ford Ranger fuel pump circuit diagram here: 1993-1994 3.0L V6 Ranger Fuel Pump Circuit Diagram.

1991: Serpentine Belt Diagram

NOTE: Your Ford Ranger will use one of two different size serpentine belts depending on whether it's equipped with air conditioning or not. Illustration #1 applies to the A/C equipped Ford Ranger and illustration #2 applies to the non-A/C equipped Ranger.

1992-1994: Serpentine Belt Diagram

NOTE: Your Ford Ranger will use one of two different size serpentine belts depending on whether it's equipped with air conditioning or not. Illustration #1 applies to the A/C equipped Ford Ranger and illustration #2 applies to the non-A/C equipped Ranger.

Intake Manifold Torque Specifications

Above is the suggested tightening sequence for the lower intake manifold to avoid vacuum leaks and premature intake gasket failure.

NOTE: Install the intake manifold gaskets dry. In other words, don't coat them in any type of sealant (like RTV Silicone). Installing them dry will ensure a job that won't come back.

1991-1993: Intake Manifold Torque Specifications
Step 1	11 Ft. Lbs. (15 N.m)
Step 2	18 Ft. Lbs. (24 N.m)

1994: Intake Manifold Torque Specifications
Step 1	11 Ft. Lbs. (15 N.m)
Step 2	24 Ft. Lbs. (32 N.m)

Intake Manifold Plenum Torque Specifications

Above is the suggested tightening sequence for the intake manifold plenum to avoid vacuum leaks and premature intake plenum gasket failure.

NOTE: Install the intake manifold gaskets dry. In other words, don't coat them in any type of sealant (like RTV Silicone). Installing them dry will ensure a job that won't come back.

1991-1994: Intake Manifold Plenum Torque Specifications
Step 1	11 Ft. Lbs. (15 N.m)
Step 2	19 Ft. Lbs. (26 N.m)

Cylinder Head Torque Specifications

Above is the suggested tightening sequence for the cylinder head bolts to avoid premature gasket failure.

NOTE: Install the intake manifold gaskets dry. In other words, don't coat them in any type of sealant (like RTV Silicone). Installing them dry will ensure a job that won't come back.

1991-1994: Cylinder Head Torque Specifications
Step 1	59 Ft. Lbs. (80 N.m)
Step 2	Loosen all bolts one complete turn
Step 3	37 Ft. Lbs. (50 N.m)
Step 4	68 Ft. Lbs. (92 N.m)

Where To Buy The Tune Up Parts

The following links will help you comparison shop for the original Motorcraft components:

IMPORTANT: The Motorcraft DH-434 distributor cap is the OE distributor cap for the 1986-1994 3.0L Ford Ranger.

IMPORTANT: The Motorcraft WR-4069 spark plug wire set is the OE set for the 1981-1994 3.0L Ford Ranger.