The 6 wire MAF has the filament across the whole tube. The 4 wire has a sampling tube to one side. I was having problems because air was avoiding the sample tube because of the relatively small amount of air out cars use compared to say a v8.
04 Subaru WRX "Eurosport bling bling fast and furious tokyo drift"
"They have diarrhea of the mouth, and constipation of thought"
