I actually have an 2006 and 2007. I've that I drive daly, in temps ranging from 35°C to add cold as -45°C. It does take a lot more care and maintenance to keep them running strong. I've had tons of cars over the years, but I'm not sure of had another that I enjoy driving as much as a Speed6!
I guess that was my point. Lol. When the compression test didn't change on the wet test. I like to err on the side of the least side of catastrophic failure, until proven otherwise.
Here's a couple of logs. One from last year, showing KR. Will suggested that the injector seals might be leaking. The second log is after cleaning and Overspeed seals.
I had my own wiring jackpot here this afternoon. Picture two old guys one a carpenter the other a mechanic, arguing over how Automotive wiring works.... lol
From that picture, that left one looks like Hell! The female spades look twisted. I'd focus there. Test the injector with your ohm meter, if it's the same as the others, call it good.