6631 msd ignition wiring diagrams. MSD 6631 6 HVC, Professional Race with Rev Control Deutsch Connectors Installation User Manual 2019-02-15

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6631 msd ignition wiring diagrams

Hold the Gray tach output wire to ground for seven seconds. This is easily achieved through the cylinder select wire loops on the side of the ignition. If the tach still does not operate, you will need a Tach Adapter. For more information on recommended coils, check with our Customer Service Department at 915 855-7123. The dial on the left is for 1,000 rpm increments, on the right is for 100 rpm increments. Note: Do not use digital or dial back timing lights.

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MSD 6631 6 HVC, Professional Race with Rev Control Deutsch Connectors Installation User Manual

6631 msd ignition wiring diagrams

Hold the Ignition in place and mark the location of the mounting holes. If there is no spark skip to step 6. This is a glass woven and silicone coated protective sleeve that you slide over your plug wires. Inspect the spark plugs and complete fuel system. Turn the ignition to the On position. The high speed controller can make extremely quick compensations to the output voltage, multiple spark series, timing and rpm limits while maintaining precise timing and accurate rev limiting.

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How to install an MSD 6A Digital Ignition Module on your 1979

6631 msd ignition wiring diagrams

The following Figures show common wiring schematics. When the key is in the On position, the rev limit will be displayed and may override the tach memory. Use the Ignition as a template to mark the location of the mounting holes. If triggering with the Magnetic Pickup: 1. All connections must be soldered and sealed. The chart in Figure 4 lists common tachometers and if an Adapter is necessary.

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How to install an MSD 6A Digital Ignition Module on your 1979

6631 msd ignition wiring diagrams

For example, in a Chevy V8, the firing order is 1-8-4-3-6-5-7-2. I will be ordering again in the future. Setting both rotary dials to '1' will activate a special function explained below. The Soft Touch produces a load-free rev limit that is within 1% of the selected rpm. If spark is present, the ignition is working properly. Also be sure that the program dials can be accessed.

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MSD 6631 6 HVC, Professional Race with Rev Control Deutsch Connectors Installation User Manual

6631 msd ignition wiring diagrams

These examples are just starting points to get you going in the right direction. With that, you can then experiment with the plug gap to obtain the best performance. If this occurs, bypass the filter. Ballast Resistor: If your vehicle has a ballast resistor in-line with the coil wiring, it is recommended to bypass it. Make sure the Diode is installed facing the proper direction as shown in Figure 6.

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How to install an MSD 6A Digital Ignition Module on your 1979

6631 msd ignition wiring diagrams

Routing: Correct routing of the plug wires is also important to performance. If you are experiencing run-on, it is due to a small amount of voltage going through the charging lamp indicator and feeding the small Red wire even if the key is turned off. It is best if they are routed along a ground plane such as the block or firewall which creates an electrical shield. As soon as this process is complete the feature will be activated. When activated, an rpm signal is sent to the tachometer. I think they all do a fantastic job and it is a wonderful website.

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MSD 6631 6 HVC, Professional Race with Rev Control Deutsch Connectors Installation User Manual

6631 msd ignition wiring diagrams

This can be prevented by drilling a couple vent holes in the cap. AmericanMuscle also offers Free Freight Handling to locations with loading docks in the Continental 48 States. If your engine continues to run even when the ignition is turned Off you are experiencing engine Run-On. It is not recommended to mount the unit in an enclosed area such as the glove box. Enable Rev Limit Verification 1.

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6631 msd ignition wiring diagrams

The 5 and 7 cylinders are next to each other in the engine and in the firing order. The Ignition will deliver full voltage with a supply of 9 - 18 volts. Remember to always use proper connections followed by soldering and seal the connections completely. This output produces a 12 volt, square wave see page 2. Do not crank the engine. If 12 volts are not present, find another switched 12 volt source and repeat the test.

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How to install an MSD 6A Digital Ignition Module on your 1979

6631 msd ignition wiring diagrams

Each time you pull the wire from ground, a spark should jump from the coil wire to ground. If there is now spark, the coil is at fault. Turn on power to the ignition without starting the engine. The Mag positive + wire is Violet, the Mag Negative - is Green. Grounds: A poor ground connection can cause many frustrating problems. This will protect the ignition in the event of wrong connections. If there is no spark skip to step 6.

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