Subaru convertion, Need help with fooling the ecu Options

[RSR]

I'd like to introduce my self, my name is Donald this is my first post hello to all my mid engine Porsche brothers and sisters. I've joined this forum because I'm in need of help trying to make my 1998 986 pass smog in Ca. I know there's been a lot of guys running Subaru power on here. (I found this car half done while looking for a 914 to do a Subaru transplant) it was to cheap and ran and drove so here I am. I'm running a 2000 ej25 sohc adapted to my stock 986 G86/00 5 speed. The Porsche gear box has no neutral switch so I keep getting a P01597 code and then that leads to idle control faults as well. Any help would be very much appreciated.

[Chris914n6]

First off, couldn't find that code you referenced.

Second, all modern manual trans cars have a safety feature that requires the clutch pedal in, in order to engage the starter. Keeps drivers from starting the vehicle in gear and crashing into something.
The Boxster should have the switch at the clutch pedal like the subie would.

The neutral switch affects engine power. I normally only see that in auto trans as it's the equivalent of the clutch switch, but located on the shifter.

Auto and Manual ecu's will have different software. The Auto talks to the trans ecu and will throw codes if it can't get the data it wants.

Idle control faults sounds like an Auto ecu. It will kick the idle up when in gear to compensate for the trans load. A manual ecu should solve your problems.