TBI and high AFR's

I'm running the Fuel-it TBI and I am seeing high AFR's after lifting off the throttle. I can understand this if I was under boost and fuel was flowing, but this happens when just driving down the street. The Hobbs switch is set to 15 psi, so I should not be seeing any flow. I think I need to rig up something to check the pressure to activate the switch.

Any ideas?

http://ift.tt/24dsXfl

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MHD Wedge - E40, VRSF CP, DP's, Inlets, 7" Intercooler, Tial BOV, Stg 2 Fuel-it, Eibach Pro-kit/Custom Koni's

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TBI and high AFR's