Re: Don's 08 STI. STI Hatchback/Wagon or bust!
I added some clamps and zip ties to all the 6mm vacuum hoses and noticed the a/f correction dropped down to -10 and steadily adjusted itself to zero at idle. Feels powerful again and no smoking from the tailpipe. The evap solenoid #1 was the hardest to get to so they got zip tied. Everything else is clamped. I need a retune considering it was tuned with the vacuum leaks not known at the time. I guess Subarus are prone to vacuum leaks. I also went with the Prova AOS. It was an easy 5 min install and my intercooler is clean again. It didn't cost as much as the other AOS I had and it doesn't have all the crazy vent hoses going all over the place, it works as advertised.