Lawson's 818C

  • Engine
    • So I spent yet another weekend mostly troubleshooting engine issues. I had hoped that the ECU swap would be a nice 10 min fix-everything solution but that was far from the case. I swapped the ECU’s and everything stayed exactly the same which was quite disappointing. I quadruple checked my AVCS wiring and found that I had switched two of the sensor wires side-side (second time I’ve done a similar thing because the plugs change orientation in the pinout instructions). With that fixed, I still had the check engine light but AVCS was working as it should on the new ECU when I logged. So I logged, looked over the logs, logged some more, looked again, got friends to look, etc. I nearly gave up until I remembered someone casually mentioning that some EJ207’s had a IAT sensor in the throttle body which was redundant when the USDM and other cars had one in the MAF as well. Sure enough, unplugging that allowed the check engine light to go away! With how common this swap is, I’m not sure how that info was so hard to find or diagnose. I still have not determined which versions of the EJ207 have the different IAT sensor and which don’t.
    • The car with full boost is fast, very fast. I never drove the old engine at WOT before it died, but this one is quite the thrill! Should be plenty of power for me.
    • I hope my engine work is wrapped up for a while. Ready to move onto something else, anything really, on the build.
  • ABS
    • ABS is fully functioning. Wiring all worked perfectly and I can hear the pump run as it activated. I’ll have to get to some better testing facility than my driveway to really evaluate it.
  • Seats
    • Seat brackets were cleaned up and painted. Should be ready to go back in the car soon.
  • 3D Printing
    • I’m designing revised radiator mounts and a mount for my airbox using CAD and I’m going to 3D print them. The airbox really needs to be secured before I drive it too much more and my radiator mounts could just use some aesthetic improvements.

  • Seat brackets getting painted


  • Bad picture, but no CEL!!!!


  • Buried deep in there is the troublesome IAT sensor


  • I swapped the white/blue and white/orange wires on this plug