SIDrive Posted December 17, 2022 Share Posted December 17, 2022 Chasing a P0171 and found a broken / dry rotted vacuum hose right away. Going to replace it but noticed it has what looks like a check valve. If it is a check valve it is bad - air flows easily both ways. Can anyone verify the yellow circle in the attached image is a check valve? And if it is what is the correct orientation for flow. I do not see arrow on it. Thanks in advance. Civilization has brought Evolution to a screeching halt 2007 Legacy GT auto 1989 Turbo Trans AM 1987 Buick Grand National 1983 DeLorean (Buick turbo transplant) Link to comment Share on other sites More sharing options...
silverton Posted December 17, 2022 Share Posted December 17, 2022 I believe that is a filter, since it feeds your MAP sensor. https://parts.subaru.com/p/Subaru_2007_Legacy-25L-TURBO-5MT-4WD-GT-Limited-Sedan/Vacuum-Line/49231576/22310AC270.html Link to comment Share on other sites More sharing options...
SIDrive Posted December 17, 2022 Author Share Posted December 17, 2022 Silverton, thank you. Found it about 10 mins after I posted. Left the filter and replaced the vacuum line and all is well. Civilization has brought Evolution to a screeching halt 2007 Legacy GT auto 1989 Turbo Trans AM 1987 Buick Grand National 1983 DeLorean (Buick turbo transplant) Link to comment Share on other sites More sharing options...
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