SCREEAAAWWWWWW Posted July 19, 2011 Share Posted July 19, 2011 Hi I think my 81 gl wagon is supposed to have two full filters, so far I have only found and replaced the one by the driver's side rear wheel. Supposedly the secondary is under the hood somewhere but I can't seem to locate it. Could anyone point me in the right direction? Link to comment Share on other sites More sharing options...
danzick Posted July 19, 2011 Share Posted July 19, 2011 sorry i cant tell you where, but my dad used to have a Subaru way back in the day, and i just bought one and he was telling me he could have swore there was 2 fuel filters too, but the manual only shows one and he cant remember where it is. cause im having problems with bogging in mine Link to comment Share on other sites More sharing options...
GeneralDisorder Posted July 19, 2011 Share Posted July 19, 2011 Should have a filter/vapor seperator just to the inboard side of the driver's side strut tower. These only exist through 1984 (and through '87 Brat's and '89 Hatchbacks) - EA82's only have a single filter. GD Link to comment Share on other sites More sharing options...
SCREEAAAWWWWWW Posted July 19, 2011 Author Share Posted July 19, 2011 I can't find anything that looks like that filter anywhere in the engine compartment. The only thing that even looks like it has lines going to my carb is this: and heres one a little more far away for reference Heres a shot of the drivers side of the engine compartment by the strut tower: I really don't know where the filter is, perhaps someone bypassed it? That would be really dumb but you can't put stuff past anyone these days. Link to comment Share on other sites More sharing options...
ferox Posted July 20, 2011 Share Posted July 20, 2011 '81s don't have the vapor separator/filter. They just have the one filter by the gas tank. No filter under the hood. Link to comment Share on other sites More sharing options...
SCREEAAAWWWWWW Posted July 20, 2011 Author Share Posted July 20, 2011 Thanks for letting me know I would have searched forever for it! What is that other thing I took a picture of? Link to comment Share on other sites More sharing options...
86ea82 Posted July 20, 2011 Share Posted July 20, 2011 looks like a egr thingy mine came without any egr so im not sure Link to comment Share on other sites More sharing options...
MilesFox Posted July 20, 2011 Share Posted July 20, 2011 looks like you have an underhood fuel pump Link to comment Share on other sites More sharing options...
ferox Posted July 20, 2011 Share Posted July 20, 2011 looks like you have an underhood fuel pumpYes, another standard feature of the '81s that was changed in later years. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted July 20, 2011 Share Posted July 20, 2011 Ah yes - the 80/81 under-hood pump. It seems like many of these were converted - maybe by the dealer? You may have a weak fuel pump - I've seen a number of those under-hood pump setups that have been replaced. The factory Subaru fuel pumps develop very little pressure (about 1.5 to 2.5 psi) and when they get old..... you might want to check volume and pressure on it. Could be that the filter wasn't the only issue. GD Link to comment Share on other sites More sharing options...
SCREEAAAWWWWWW Posted July 20, 2011 Author Share Posted July 20, 2011 Ah yes - the 80/81 under-hood pump. It seems like many of these were converted - maybe by the dealer? You may have a weak fuel pump - I've seen a number of those under-hood pump setups that have been replaced. The factory Subaru fuel pumps develop very little pressure (about 1.5 to 2.5 psi) and when they get old..... you might want to check volume and pressure on it. Could be that the filter wasn't the only issue. GD Really? That is good to know, I will have to find my fuel pressure tester and give it a look, what psi is it supposed to run at? Link to comment Share on other sites More sharing options...
GeneralDisorder Posted July 21, 2011 Share Posted July 21, 2011 About 1.5 to 2.5 psi. I think I said that...... You will need a VERY accurate gauge. GD Link to comment Share on other sites More sharing options...
SCREEAAAWWWWWW Posted July 21, 2011 Author Share Posted July 21, 2011 About 1.5 to 2.5 psi. I think I said that...... You will need a VERY accurate gauge. GD You're right you did I'm sorry I have a lot on my mind, I appreciate all the information and appreciate you repeating it haha. I can't find my pressure tester anywhere :-\ I don't think it was good enough to test that small of a number anyway. Link to comment Share on other sites More sharing options...
ferox Posted July 21, 2011 Share Posted July 21, 2011 Ah yes - the 80/81 under-hood pump. It seems like many of these were converted - maybe by the dealer? I think maybe even the filter was originally under the hood without one by the tank. I can't remember that far back on my hatch, but it seems like every '81 I have seen at the very least had the filter converted back by the tank. You may have a weak fuel pump - I've seen a number of those under-hood pump setups that have been replaced. The factory Subaru fuel pumps develop very little pressure (about 1.5 to 2.5 psi) and when they get old..... you might want to check volume and pressure on it. Could be that the filter wasn't the only issue. GD Additionally, the under hood pump does a lot more pulling of fuel than pushing (pushing is better, that is at least one of the main reasons it was relocated by the gas tank in later models). Conceiveably, an underperforming pump located under the hood may work adequately when relocated by the gas tank. Anecdotally, I have never had a problem with the under hood pump on my hatch over the past 6 years. However, once I had to prime the fuel line with a Mityvac after I pulled the gas tank. It's an easy switch to move the pump, and (hopefully someone can verify this) but I think the '81s had in-line vapor separator(s). Also that wierd black canister with the two vacuum lines is an air cleaner that I think kept dirt out of the duty solenoids. I think they have a reed check valve mechnism, and it's almost guaranteed that it is not functioning properly, not to mention the duty solenoids. Link to comment Share on other sites More sharing options...
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