help please

[my 1984 celica-supra]

i recently bought a 1984 celica/supra it sat for about 1 year had to replace fuel pump. But now when i come to a stop the throttle will not return back to idle unless i rev it up a few times. Also it looks like a cv joint cover in the front on the driverside which is leaking fluid badly feels like brake fluid but not sure. Any help would be greatly appreciated.