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Discussion Starter · #1 ·
I am new to this forum and tried to send this once before but I must not have done it correctly, so bear with me. I have a 2008 620i Gator to which I am adding an aftermarket tach/hour meter. Installation instructions ask me to select one of the following spark plug firing patterns: 1. fires twice per revolution; 2. fires once per revolution; 3. fires every other revolution. My engine has two spark plugs. Which pattern should I select?:confused:
 
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