jamesm113 Posted September 13, 2011 Share Posted September 13, 2011 How does this solenoid work and what is it's purpose? Is it a typical open/closed solenoid? Is it supposed to be closed when not energized? Does it allow atmosphere air in? I'm currently tracking down a P0440 EVAP code, and my pressure control solenoid has a very faint click, but remains open (ie, I can blow through it), whether or not 12V is applied. I've also tried plugging one port with my finger and applying a vacuum to the other port and then applying 12V - vacuum holds. The solenoid connects the charcoal canister to top of the fuel tank. Here's a picture of the valve: Thanks, any help much appreciated! Link to comment Share on other sites More sharing options...
jamesm113 Posted September 14, 2011 Author Share Posted September 14, 2011 Well I took another look at it today. It appears I must have been doing something wrong first time around. I blew it softly, it was closed, but when I blew harder, it let air through. When I applied 12V, it let a lot of air through, so I think it's supposed to be closed by default, then lets air in when 12V is applied. Can anyone confirm this? Also, it's a 97 Legacy L AWD, 2.2L. Thanks! Link to comment Share on other sites More sharing options...
nipper Posted September 19, 2011 Share Posted September 19, 2011 It may not be closed by default as it can be a check valve or reducer valve of some kind. From where on the car was it located. Link to comment Share on other sites More sharing options...
jamesm113 Posted September 22, 2011 Author Share Posted September 22, 2011 (edited) It may not be closed by default as it can be a check valve or reducer valve of some kind. From where on the car was it located. Could you elaborate a little bit more? I just got one from a parts car and it seems to behave the same way as the original. EDIT: This article says it's a two-way check valve to regulate pressure - could that be the case with our pressure control solenoid valves? Thanks Edited September 22, 2011 by jamesm113 Link to comment Share on other sites More sharing options...
nipper Posted September 22, 2011 Share Posted September 22, 2011 It regulates pressure. It does not have an open and closed, it has a partial flow and full flow position. I can not tell you any more unless I know from where on the car it came from. Link to comment Share on other sites More sharing options...
jamesm113 Posted September 22, 2011 Author Share Posted September 22, 2011 (edited) #7 = pressure control solenoid. E side connects to two fuel cut valves on the top of the gas tank. #14 connects to the pressure control solenoid. #11 is a rollover valve, #16 goes to the charcoal canister Edited September 22, 2011 by jamesm113 Link to comment Share on other sites More sharing options...
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