hesitation @ 6,200

spartan 2

New Member
Apr 2, 2007
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I have a 96 cobra with a vortech v1, a 255 lph pump, and a vortech fmu. it was running fine all the way to 6800, untill about two weeks ago. now it sort of hesitates at about 6200. I am running 10-12 lbs of boost, but when it didnt hesitate, itd run up to15 at 6800. my air fuel guage is all the sudden going lean, and i need advice on how to cost effectively run alittle more fuel.

i have new plugs, wires, and fuel filter, wich are good.

My spark advance is normal between 0-2000 & between 2000 & 8000 is set to the lowest setting that my tunner allows, wich is 2 degrees advance, down 8 from normal. I am running 14% richer. (wich is also all my tunner allows)

is the fmu from vortech adjustable?