vems v3.8 installed on mx5 nb vvt with cam sync
using 36-2 crank trigger wheel to allow better sync
cam sync modifed to one tooth to allow correct sync angle for vvt
wiring
The most likely cause of "p259" (=TPIC6A259) chip failure is insufficient ground connections. Please check GenBoard/Manual/GroundConnections (With good connections and no overload the chip will likely to work 30+ years. However, failing to fix the root cause will likely result in damaging the p259 chip, possibly again and again). It is best to use spare injector outputs, or spare power-IGBT (ignition) outputs to drive relays, solenoids, and only use p259 for warning light, LEDs (with series resistor) and similar signals.
The car has a custom wiring loom for the engine. The original car loom has been spliced in to the ecu for the original gauges to work
Alternator control
The alternator is normally ecu controlled however I've fitted an aftermarket alternator controller board this is wired to the ecu to disable the alternator on startup and used on high tps to get more power
http://www.vems.hu/files/lewisw%20mx5%20nb/v3.3_u023257-A-2026.01.24-16.08.32.vemscfg
this is the lastest config at the point of write up. the car is up and running but not mapped yet