I have a 93 lx with a 302.My motor is missing at 4000 rpm's .It seems to get better when the motor warms up .I checked my voltage at the coil and it's only 10.5 volts.Just out of curiosity i used an engine ground for the negative and i measured 12.5 volts.Seems as if i have a bad ground.I relocated my battery to the back so i ran an 8 guage to the front for the computer ground.Looking at a schematic shows the negative for the coil comes from the computer.I checked the ground at the computer for continuity and it's good.I even tried another A9L to see if the computer was bad and it did the same thing.I know the 2nd computer is good.If anyone can think of anything i would greatly appreciate it.