i have a feeling his plugs are gapped out at 032 or larger. probably pulled them straight from the box and threw in. also, an SAFC on an enthalpy ecu? bad news bears. make sure you have the same number under 'in' and 'out'. chances are, the ecu is already mapped for a Z32 maf and the safc is fucking it up more.

ive never had ANY issue with an enthalpy ecu. anytime anyone does, its usually due to the car owners ignorance/negligence