Gas Smell With Sunroof Open

I got a walbro 190 installed about 2 weeks ago at SLS. Now when I open my sunroof i get a gas smell in the car. I have driven it around with the roof closed and then tried to find any hint of a smell, but there is none. This only happens when the sunroof is open. Ideas? Nick said when he did the pump he looked at the fuel lines and they looked good.

[A//// Guy]

Well there would be vacuum so maybe the air in the hatch is rushing forward. I would check all the connections and look for a leak?