Hi Jay, nice to see you around here. Thanks for the help as always. No worries, it all comes with the territory of modded, older german sports cars.
So here's an update...
As mentioned, a new immobilizer was installed (also, the old one was found to be in good shape). All plugs were cleaned as well as the grounds, all fuses were checked and a couple of them replaced, and finally the new ignition switch arrived and was installed. And then...
Nothing
Same exact symptoms - When remote is pressed doors lock for a second and then unlock (backwards for gas lid). No light flash, no alarm chirp. Now I'm stumped. What else could it be? Maybe another bad ground somewhere? For a while I considered the door switches but those seem fine (both windows do the slight adjustment when doors are opened/closed every time). Any ideas? I want to drive my Boxster and I can't put gas in it!!!
On a brighter note at least the tailights now both work
.