Do you have a fuel pressure gauge and regulator so you can set your fuel pressure between 6 to 6-1/2 PSI? The AVS2 650 is infamous for set up lean out of the box. The recommended float height is 7/16 and mine was set at 9/16 out of the box. I'm at 2500 feet of elevation and had to move the accelerator pump arm to the top and richen my primary metering rods, jets, and pump squirter. At your 250 feet or so of elevation, I imagine your probably going to need a lot of enrichment the over OOTB settings.