Accelerating problems! pt.2

I have a 1990 Toyota Celica ST 1.6l. When I let off my clutch pedal, my RPMs' drop. The engine sounds like it's going to stall, but it doesn't. It idles fine, and once I get going it runs well. I replaced my head gasket, oilpan gasket(leaking), exhaust manifold gasket, ect... My car still has accelerating problems. I replaced the fuel filter as well. I disconnected my exhaust to see if my catalic converter was clogged. None of those things fixed my problem. What's most likely the problem with it? Please help.

My manual transaxle seems to be leaking alot of fluid. It seems to be coming from the passenger-side CV axle seal. Could that be causing poor acceleration and almost stalling?