I have tried the brake booster testing, no issue. I did replace with one of those orange gaskets from the Toyota dealer too. I appreciate any more suggestions or info please. Now my engine has been starting to spark knock on acceleration and been getting worse for months now due to the lean issue.

Good Morning Everyone...I am new to this post and it has saved me on numerous occasions with my Vibe. I own a 2006 Vibe and use it as a work car so it gets lots of mileage(150K). Anyway, I bought this car 2 years ago and have had fuel running lean issue since I bought it. Intermittently I will recei...