Hi guys. im new to this forum so please bare with me. I have a misfire in cylinder 3 in my 4 cyl accord. i got a compression test and cylinder 1,2, and 4 all had 220 psi while cylinder 3 was running at 120psi. Hondas requires a minimum of 135psi in a cylinder. Any way i can increase the compression in that cylinder? car has 134,000 miles on it.

 

your rings on the piston are bad or your losing compression from through your valves in that cyl. You need to do a leak down test to be 100% sure