Did you all have a good Christmas? I certainly did, as I got the MX5 up and running again. To run down briefly, I put it in the garage in October to prep pre MOT (a few mods required, including fixing horn, wiring up rear fog light). I also asked the garage to fit a new water pump and fix a wheel bearing.

After this stage it just wouldn’t rev correctly. I was always under the impression that it must be something mechanical, but as it runs an aftermarket ECU and I’m still new to this thing, it didn’t quite dawn on me how much the computer and brain of the car had in controlling spark and ignition pattern and timing.

Long story cut short, I reset the whole system, starting from scratch. This involved loading a basemap, fuel map, AFR (air fuel) tables and so on.

The car is running again, and here’s a video.