Driving at a low rpm in a car with a cam, the car will buck sometimes. Thats normal with a cam. Your car is also running lean from the a/f readings you posted. In the upper rpms, low to mid 13's is considered the norm a/f for n/a cars. I have the TFS 1 cam and it'll buck sometimes in a low rpm in a high gear, but mine doesnt seem to do it like your does. Whats the rest of your combo? Sounds like it needs tuning.
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TFS heads/FTI custom cam/TFS street heat, Longtubes, 373's, MM lca's, Tokico springs/shocks
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