Unhook MSD when uploading a tune?
I thought I remembered a thread awhile ago where someone said that it was a good idea to unhook your MSD ignition box when you were programming your PCM with a laptop. Does anyone else follow this school of thought? And if so, what would be the safest way to go - just unhook the positive lead from where it connects to the battery?
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No need to disconnect the ignition system. Just make sure that your battery is fully charged and that your laptop has a charged battery and is connected to the wall as well.
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