[Richard L]

The aquamist system can be triggered by idc or MAP sensor. Please note trigger by psi will not be as consistent as boost develops at different point of the RPM under different gears. Basically, boost without RPM reference does not represent true engine load. Anyway, he can do what ever is comfortable to him.

There are no differences "electrically" between splicing into fuel injector of AEM output wire, needs the same skill set.

For AEM controlled option, just connect the green wire of the grey harness to the AEM PWM output, set the threshold to the lowest trigger point. (fully CCW).