? on my IR compressor

[brans72]

I hve a IR ss5l5 5 HP, 18.1 CFM @ 90 PSI, 230 Volt compressor but it seems to be lacking power and is only couple yrs old now (bought new) and done oil changed etc and drain tan reg bases. Just seems it does not run my die grinder,1/2 impact etc like it should for it size. The compressor is in another building and plumbed in to gauge etc about 50 foot black pipe think 3/4 size would have to measure again. So any ideas what to do? most my tools are matco and use low cfms so what gives? I need some help fellows!!!! Thanks Brandon