Quote:
Originally Posted by RockBit
Patrick - what does the capacitor do?
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The capacitor is installed "across" the positive and negative feeds to the MSD box. If it was just a wire it would be "short-circuiting" the two wires. But, it's a capacitor, so once it reaches its fully charged state it stops the direct current going across it but continues to act as a "shock absorber" for direct current voltage spikes, thus protecting the MSD box from them. Plus, if your alternator is leaking AC current out, a capacitor across the lines acts as a short cut for the AC to pass right through and head back home without ever going in to the MSD box to help muck up the electronics.