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Old 04-08-2020, 10:45 PM   #1
jamie2370
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Join Date: Dec 2014
Location: Perry, GA
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Default Fast xfi rpm issue

Fast xfi, analog 7al2, fast dual sync dist. My autometer tach is roughly 500rpm less than what fast data shows. Fast at idle shows 1100 while tach is around 600. Is this normal or if not, what is the fix. I honestly thought I had a low reading tach before I put on efi, just now I have another reference that should be super accurate since its dual sync
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