i own a 1991 accord ex (F22A4). when it had 100,000 miles it tested 145psi in all 4 cylinders, it now has 150,000 miles, i dont feel like going in and getting it tested so could anybody give me an idea of where the compression stands as of now, i know its prob hard to geuss but give me an idea? also, how much did it have when it was bran new, just curious. whats too low and when should i start thinking of a rebuild or engine swap, thanks.

 

Generally (speaking on most engines) your range should be between 175-195. There is no real way to guess the compression of the engine after 50,000 miles. The only thing you can do is go back and have it done again.