Well going through this little 2.3 on my 96 ranger. I had a slightly rough idle I couldn't seem to get out of it. Well compression on cylinder 1 is 124. The rest are 160-165. My guess is something happened to make that one cylinder low. What would you do with it? Just run it as is? I wonder how long it can operate as is? Swap a used engine... The truck is relatively solid but not in the best shape plenty of dents. And scratches, mostly superficial stuff undercarriage and what not isn't to rusty. Check out the cylinder wall pictures below. Tell me what you think.