I had a little bit of more time to mess around with this car today. First, I tried swapping the OEM FPR for another one I had and took the car out for a drive. No difference whatsoever.
Second, I finally broke down and took BuGG's suggestion that he mentioned a long time ago ... I rigged up a way to try and recirculating the BOV. What I did is so ghetto I can't believe I'm even showing you guys, lol, but here goes.
I had a few spare old accordion intake pipes laying around. These OEM intakes have that recirculation tube on the bottom that feeds air back into the air canister. I had this idea that maybe there would be a way to remove that and use the open port to recirculate the BOV.
It was a little bit of work to get that tube out, I think it was glued in from the factory, but I got it off after working it a while with a flathead screwdriver.
I found an old coolant hose that fit in there perfectly.
Unfortunately that diameter of the coolant hose is way too small for the BOV opening, so I had to find another piece of tube that fit on the BOV and mesh the two together. And this is where it got kinda ghetto. I had to use some duck tape and make it work. It's only for testing purposes ... right?!
Here it is on the car. Kinda hard to see, but you get the idea.
I noticed an immediate difference before I even got out of my neighborhood on the wideband. The car ran WAAAY better, boosted much better, and at a traffic light the wideband was showing numbers like what you see below - not 10 or 11 like it was before.
The whole thing is just so strange to me b/c the car would run rich when it hadn't even made boost yet, and thus the BOV hadn't even opened yet. I can only wonder if maybe the BOV vents air a little bit all the time and that throws off the ECU readings off and so it thinks it needs more fuel. Anyway, I'm still very hesitant to call it "fixed" b/c this is battle I've been fighting for almost 4 years, but it definitely feels like I made some major progress today. Now, I need to come up with a way to recirculate the BOV a bit better w/ some different hoses/piping. Time to hit up Google ...
Edited by techboy, 17 December 2020 - 05:15 PM.