Thanks for the info guys. Got everything working and finally to the dyno.
The TACHOUT was already hooked up, however my stock wiring must have some ground issue or possibly even a short somewhere.
These WERE my symptoms:
-STOCK coils, 3-4k rpm erratic tach
-COPS, idle AND 3-4k rpm erratic tach
-resistor connection in the diagnostic box did nothing, connected or not. must have pullup already
-COPS tach signal disconnected- tach still worked... LOL
-COPS signal disconnected, TACHOUT ON, tach still erratic
-bypassing stock wiring with TACHOUT wired to DB15 in DIYPNP, wire going directly to back of gauge cluster, steady TACH at all RPMS
Thanks again guys!