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Old 05-25-2014, 10:59 AM   #5
Snailed
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Join Date: Jul 2013
Location: Portland, Maine
Posts: 219
Re: Jerking while at cruise speed

It may be too lean at low load.

What it your air fuel ratio? My 350 won't do a light cruise much leaner than 15:1. Any leaner and it jerks. Maybe you have a small vac leak or the floats are too low?
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