i have had a s100 system on a customers car for nearly a year now. he has chosen to upgrade the engine to use a wet NOS system. the computer is an American p72. i am using the PSP switch for the arming input and am trying to use the PCS pin for the output.
i have found that A20 sends a ground signal to the NOS relay while in ignition 2 and for a short period of time after the car starts. it does this with the "input" armed or disarmed. i have tried to alter the engagement parameters with no change to the overall "output". i am still getting a "unreliable/unpredictable" signal from the ecu.
i have tried two different ecu's with no change.
any suggestions?