It seems to idle alright. Every now and then it will idle around 1500, but after a few seconds of doing that it I guess the ECU figures things out and it goes back to around 800. Kind of annoying, but it's the price I'm willing to pay for a stable TPS signal.

MAPdot seems to be kind of finicky on my setup, I never really got it to work as smoothly as TPSdot.

I've some other weird problems lately related to noise... For example, if I press on the main connector in a certain direction my IAT and CLT values will tweak out by a few degrees. Not good. I pulled apart the connector and I noticed some sketchy connections which were probably from always connecting and disconnecting the thing so I wired up a new connector (pain in the ass) and the problem hasn't gone away yet. Maybe it's a flakey solder connection on the board or something, I don't know. With final projects due this week and finals next week I haven't had much time to debug the thing recently.

EDIT: fixed the weird coolant/intake tempature problem. My vacuum hose that goes from the MAP sensor to the bulkhead fitting was routed under the main connector, touching almost all of the pins. It turns out that the hose I'm using has resistance, I measured about 40-60k ohms per inch. I taped it up with some eletrical tape and it's fine now.

2016 WRX STi Limited (current)
2001 A4 1.8tqms (donated)
1991 GVR4 #1933 (sold)
old.dsmregistry.com/detail.php?carid=218 (dismantled)