blipping the throttle when cold = full lean

[WestfieldMX5]

With a fully wamed up engine, throttle response is very good. Blipping the throttle reacts very fast, no lean spike and AFR's go in the 12 region and fall back to stoich.
With a cold engine though, blipping the throttle results in an extreme lean condition where the engine nearly stalls.
I'm not sure where to adjust things to resolve this, any hints? More ASE?
I didn't take a log, I'll do so in the morning;

[grom_e30]

have you tried adjusting the 'cold accel multiplier(%)'

[WestfieldMX5]

currently at 110%, I'll raise it and see what happens.