i could not say..but if the rings or ring in cyl1 are chipped then they could be making grooves in the walls and then will need to be bored over..do you have any pictures of your spark plugs?and his right leak down is cheap hell harborfright even sells a pretty good leakdown tester for 55$ you can make your money back testing others cars..its pretty easy to use and you can loook online how to read the gauges when you do it