u/Ok_Welder_7768

Trying to figure out why I’m running rich on idle

Fuel trim short bank 1 and 2 are low, tuner think it’s the maf sensors but they read fine I have 80 mm intakes with sleeves out, I do hear a hissing sound coming from the catch can not sure if that is a leak??

Runs fine driving just at ideal it runs rich and I do get code P0507-00 once in awhile.

Any insight would be appreciated.