Spark plug setting should be at .31
0.031 thousandths with spark plug gap tool or just plain 31 as I go by.
.24 to .31
.28 to. 31
.31 to .36
31 gap according to my 1991 corolla manual.32 or 31
.31 to.35 by service manual
between .28 - .31"
ngk plugs are .31 to .35
0.031 thousandths or just 31 plain and simple using a gap tool.
0.31-0.36
.28 to .31