1996 Honda Civic loss of coolant and stuttering problem

Engine Performance problem
1996 Honda Civic 4 cyl Manual 180, 00 miles

I have a 1996 Honda Civic that has been loosing coolant over the past few months. I was never able to find where the leak is. Ie; no visible signs of a leak on any tubes or on radiator. I had a feeling it was being burnt off somewhere in the engine. The car has started stuttering on acceleration at stop signs or when trying to go up a hill. If I down shift it seems to burn something off and resumes acceleration. When that happens I get a strong oder that reminds me of ether. It feels like I'm one cylinder short. I changed the plugs and wires, and noticed 2 plugs had a white residue on them, and the other 2 looked normal. I did a compression reading and got 155-165-135-150. So i'm thinking I might have a head gasket leak or the EGR valve is sticking I also went to the local store and rented a radiator pressure kit but the extension wouldnt fit my cap. Please help!