Hello, i have a 1995 del sol with a b20vtec (b18c4 head, b20z1 block) which i sadly bought already swapped, just going through all the weird stuff in the engine bay and notice the variable geometry intake valve was not hooked up to any underpressure hose and the fuel vapor filter hoses were not hooked up and all over the place, i ran the fuel vapor hose straight to the outlet, deleting the fuel vapor filter, then i ran the spare underpressure line to the variable geometry intake valve and it works correctly but theres a thumping noise comming from it, when i just hold the valve to stop it from vibrating the thumping stops, just need to know if its a bad valve or do i need to replace something else.