I found this trouble shooting page.
https://www.gokartmasters.com/blog?p=trailmaster-efi-troubleshooting-guide-200-efi-300-efi&srsltid=AfmBOorR1I-V-dlM4LZctKGua02AahNqWFPCIpdtoNEg3viZ_H7PLErQ
There is no IAC i can see. It controls fuel mix based off of the TPS which you found, and a mass air...