Re: D1SPEC Stage 3 Performance Chip/Controller Module
That image is not very clear
There is a flat ground wire on end of left block to frame, must be good and clean both ends. Common for engine work being done and that ground not put back on.
Also common if engine work were starter wires including ground not torqued down on posts.
There is a main ground wire below battery to frame, not correct will have IPC and start issues.
Now there is three ground spice packs, off frame below headlights is 2 of them
Third is on right frame left of battery
Spice packs have many ground wires (black)
Could be dirty where pack bolts to frame but mostly and never looked at is pry pack apart ( if corroded harder to pry top off) and clean BOTH male and female pins and lube them up
These get wacked up with those who for some reason feel the engine bay needs more washing then their jockey shorts and the water seeps into the splice pack and corrodes all the pins
Male pins (top of pack) shown below
Mike M - 2001 / 2008 Z06s