A 1hp compressor is pretty small. You have to rate cfm at the pressure you are using the tools at. X cfm at 40 has to be drerated at 90-120 PSI, so with wear and old age, you probably have about a 2cfm

Also make sure your hoses are large enough, and that the supply fittings aren't corroded/rusted/ plugged inside. 1/4 hose is too small for most anything, anymore.