i bought a 95 ford aspire im relacing the radiator because it crracked and the owner told me it was over heating before the water started spraying out for i figured i check head gasket did a compression test

#1 cylinder=170
#2 cylinder=130
#3 cylinder=130
#4 cylinder=130

why would one cylinder be so high its only a 1.3L so i would think compressions not high probly 125-140psi per cylinder why is #1 Getting 170psi thanks