May 29, 20205 yr Figured I would post this here because its relevant to my donor motor and not to the car its going into. From a 99 Legacy EJ25D with auto trans. Putting this motor into a GL, do I need this or is it "fine" to just cap the vacuum from the intake which feeds it? Both number 1's in the FSM: Thanks in advance, Brett Edited May 29, 20205 yr by 910GL
May 30, 20205 yr Author 1 hour ago, GeneralDisorder said: You absolutely need that. GD Copy, thanks. So lets hypothetically assume that the plug for the boost sensor was inadvertently cut out of said harness for the swap (the switching solenoid is there). Am I reading this diagram correct to rectify this situation? (I'm a hydraulic mechanic by experience; I am no electrician - hence why I had someone else trim my harness). Tie terminal pos#1 into terminal pos#2 of the B21 connector Tie terminal pos#2 into terminal pos#26 of the ECM Tie terminal pos#3 into terminal pos #3 of the B21 connector Or I guess I could just run all three back to the ECM? Thanks Brett Edited May 30, 20205 yr by 910GL
May 30, 20205 yr A and B are likely power and ground. Probably 12v but you need to follow the diagram. And you need to hookup the switching solenoid as well. FYI this sensor is critical for the computer to make fuel corrections based on altitude. GD
May 30, 20205 yr Author 24 minutes ago, GeneralDisorder said: A and B are likely power and ground. Probably 12v but you need to follow the diagram. And you need to hookup the switching solenoid as well. FYI this sensor is critical for the computer to make fuel corrections based on altitude. GD Thanks for the info, I was trying to research what it was for - all I could find was that it had something to do with "atmospheric pressure" so this makes a lot more sense now. I suppose its not AS critical in my situation (I live at the coast and this car doesn't travel much, so no elevation changes) but I still want to get it hooked up. The switching solenoid is still in the harness so I'm good on that end. It looks as though both A and B terminate at the fuel tank pressure sensor. Edited May 30, 20205 yr by 910GL
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