use 93 octane, takes longer to burn, cools the cylinders a lil more. also prior to the test leave the car at idle. leaving it off the coolant gets hotter, idle, everything balances out.

what sucks the most is southern va doesn't do emissions, at least when i lived there.

 

Ok so using my 944 got my 930 through. A tip for everyone else. Ran a ten dollar g2p bottle through. A new 02 sensor.93 Octane. Intake cleaning. Readings were 1/3 rd of what they were. Also 02 sensor fixed idle and bad performance when cold.