Originally Posted by Gen1dak
Since you just did the intake, might've gotten something outta place, not sealing.
I was working my way to that and didn't want to jump the gun in the hope that it was an unrelated problem.
If it's not fuel, try spraying the engine at an idle (if it'll idle) with a spray bottle or soapy water, but don't drown it, around the new gaskets to see if you get an increase in the idle.
(EDIT) an afterthought...when you did the intake did you separate the fuel line from the fuel rail? Lift it out of the way? Separate the injectors and lift the rail and injectors?
Could be a crimped/twisted fuel line.