MSD 8734 Installation

MSD 2-Step Launch Control

for Ford 4.6L/5.4L Mod Motors '99-On

PN 8734

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Parts Included:

1 - 2-Step Launch Control 1 - Harness

Note: The 2-Step Launch Control is a low-rpm limiter that will not provide nor modify any overrev

protection. The stock high rpm rev limiter will still be active.

The MSD 2-Step Launch Control is designed for Ford Modular Enhgines with Coil-on-Plug ignitions. The 2-Step Control will provide consistent launches and quick 60-foot times. RPM adjustments are made via two rotary switches located on the harness side of the unit. The adjustment range is from 1,000 - 10,900 rpm, in 100 and 1000 rpm increments, an LED will illujminate when the launch rev limit is active.

Note: It is recommended to have the service manual for your vehicle.

Note: The engine rpm must drop more than one third of the set launch limit in order to activate. For

example, if the launch limit is set at 3,000 rpm, the engine speed must drop below 2,000 rpm in order for the launch limit to become active (one third of 3,000 rpm is a 1,000 rpm drop).

Caution: Keeping the engine on a lower rpm limit may cause the Check Engine light to come on

and could potentially damage the catalytic converter.

Parts Bag:

1 - Tap 3 - Mounting Screws

MOUNTING

The 2-Step Control can be mounted in any position but keep in mind to mount it so the rotary dials are accessible for adjustments. Hardware is supplied for mounting. Before mounting the unit, conﬁrm that the wiring harnesses reach their connections.

WIRING

8-WIRE CONNECTOR

Tan (8) Signal Connections.

8-WIRE CONNECTOR

Red 12 volt Connection through this single Red wire.

3-WIRE CONNECTOR

Black Connects to a good engine round or the negative battery terminal.

Blue Activation Wire. When grounded, the launch feature will be active.

White/Blue Activation Wire. When switched to 12 volts, the launch feature will be active.

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2 INSTALLATION INSTRUCTIONS

1. Connect the 3-pin harness to the 2-step and connect the Black wire to the good engine or chassis ground.

2. Disconnect the 2-pin connectors from each of the eight ignition coils.

3. Connect all eight of the 2-pin male connectors from the MSD harness into the factory coil connectors.

4. Plug the 8-pin connector with the single Red wire from the 2-Step to the connector with Black wires.

5. Turn the key to the On position - do NOT start the engine. Look at the LED on the 2-Step:

LED On - This conﬁrms that the wiring is correct and you can move to step 6 (Figure 1).

LED Off - The wiring is different for this application and needs to be changed. Turn the key Off, plug the

8-pin connector with the eight Gray wires into the connector with the single Red wire (Figure 2).

6. Connect the 8-pin harness with the tan wires to the remaining connector on the harness.

7. Connect all eight of the female 2-pin connectors from the MSD harness into the factory coils.

ACTIVATION

WIRES

WHITE BLUE

BLUE

STEP 4

ACTIVATES

WITH 12 VOLTS

OR GROUND

GROUND

TAN

RED

GRAY

STEP 2

BLACK

STEP 3

Figure 1 Wiring the 2-Step Launch Control.

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