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Old 05-08-2012, 05:35 PM
red406 red406 is offline
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I'm no expert here, but this problem sounds like something I ran into last year. I was helping a friend tune his truck and had the same issues. I discovered the spring was missing in the secondary. The diaphram was torn too. The secondarys were flopping open under WOT (running lean). It ran like a dog until about 3500 rpm then ran great up to rev limiter. We installed new diaphram and spring, and now runs great.
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