20v silvertop idle issue

[AlexFourTwenty]

Hello guys. It’s a silvertop 20v stock ecu just has throttle opener and metal vacuum lines under itbs removed no canister no egr. No pwrsyering no a/c. Starts up then dies a second later. I can however keep it running if I keep accelerated depressed a bit. If I disconnect the afm it runs and idles just kinda rich. It’s not the afm because I replaced it with a known good one and it’s not the iscv I took it off inspected cleaned and put back. Is there some sort of throttle adjustment on silvertop 20v ?