This ^^^^^^ was my next port of call hahaha
But as posted above CAS Afm coils and ignitor can breakdown from heat
U can test the CAS by pulling it out leaving it plugged in and turning it by hand .
U will here the injectors pulsing and be able to see coils sparking also
But after re reading the first post ( I tend to skim a lil hahaha) I would start with the iac valve an then go from there