im not getting any spark on my leading coil. before posting i searched and tried a few basics. so far ive changed the coil, igniter, coil harness, ecu, plugs, plug wires.

can anyone tell me where/what to check that might not be signaling the leading coil to fire?

trailing coils are firing.

thanks

 

try checking the engine harness that the coils plug into.
also check the ecu plugs.

 

Do you an ignition amp that only fires the leading?

 

i replaced the coil harness with a new one, i thought that was it at first.
no ignition amp.
at this point my guess is something wromng with the main harness, but wanted to elimintae all other possibilities first.
rich, you make house calls?

 

As Goofyrotor suggested, test the engine/main harness side.