What is the ground idle fuel flow of an A320 (CFM or IAE or neo)?
I don’t normally post answers that I cannot personally verify, but I have a Facebook friend who is FO in an A320. I sent him a message and asked your question. I don’t have any official documentation to reference, so take this as anecdotal...
An A320 with CFM engines burns about 600lb/hr per engine at idle in ISA conditions.
An A320 with V2500 engines burns about 730lb/hr per engine at idle in ISA conditions.
If the APU is running, it will burn another 300lb/hr.