Yet Another Idle Misfire Thread - except I've tried all the obvious steps

[97grandprix1]

yer headed the right direction, backwards. I don't know about these cars in particular too well, just bought mine, can you switch coils per group or are the wiring plugs specific? starting at the plug and moving out is all I can think of, its too specific of a problem to warrant major engine sensor changes imop. check the wires controlling the coils/ every ghost I've found was something small when I was thinking big

[komrad36]

wires controlling the coils

New ICM; backplate cleaned with degreaser, then water, then contact cleaner, then dried; gang connector cleaned with contact cleaner and dried.