r32 rb20 Leaning out under load (when warm)

[Zimm]

R32 GTS-t Rb20

The other day i was driving my car had no hood on it got caught in a little bit of rain not alot at all (dont know if this is even related)

but it sat for a few days then i drove it ran good untill it warmed up and then it starts to lean out under load i got a safc and even tried to dump lots of fuel in it but didnt help at all,

when the cars cold it wont lean out at all

im wondering if it could be fuel filter, maf or boost leak

If anyone knows what it could possibly be lemme know

Thanks

[Skym]

ECU runs engine richer when cold. Under load could be related to SAFC, as it plays with MAF voltage, so makes ECU select different load cells on fuel, ignition maps. SAFC could be making ECU select leaner load cells on fuelmap and same cells on ignition map.

Also check fuelpump (or wiring to fuelpump), fuel filter, FPR (pull hose off to FPR and see if fuelpressure rises) via checking fuel pressure (fuel pressure gauge). Intake airleak could make a difference, depending on how big leak is.