Subie2.5i Posted December 4, 2017 Share Posted December 4, 2017 Background/Issue: I recently replaced my no name headers with killerb holy headers and replaced my leaky fmic with a grimmspeed tmic also changed out my GS aos to a IAG catch can/aos. Those were the only changes to the car performance related while the car was down. Now when I start the car it idles fine for about 5-10 sec at the normal 14.7 afr then drops under 10.0 where neither my aem wideband nor the cars front afr can read that low. It idles so rich it will fill the garage with gas fumes. I cant let the car idle long enough for the ecu to have time to pop codes but no misfires since that would happen immediately from my experience. Also if when I would press the throttle just a bit the rpm would blip up in normal relation to amount of throttle depressed but as it comes back down the car stalls out. I dont have any oil in my coolant or visa versa. Compression was in the mid 140's across all cylinders nothing more than a 3-4% variation. I have yet to do a leak down test and I also have a hunch since the car sat for a few months the avcs solenoids could be stuck. Things Ive tried already: New plugs, coilpacks, front A/F sensor and rear o2, fresh gas, reflash map, injectors tested/cleaned new orings, compression test, also hardwired the fuel pump. Untested speculations: Fuel pressure regulator bad, avcs solenoid stuck, leak down test. Mods: 05 LGT wagon 5speed Protune with v2 cobb AP 93/e85 dual maps speed density grimmspeed ebcs v52 turbo perrin turbo inlet killerb headers&ewg up tial 44mm ewg GFB 50/50 recirc bov radium pump housing with single walbro 255 ID1000cc inj top feed conv aeromotive fpr grimmspeed tmic tgv deletes iag catch can Cliff Notes: Car idles super rich after swapping headers and going fmic to tmic while running speed density in both set ups. Tried multiple things now open to suggestions from the forum. Link to comment Share on other sites More sharing options...
Max Capacity Posted December 8, 2017 Share Posted December 8, 2017 I'm guessing you have an injector issue. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
sanchitosonria Posted December 9, 2017 Share Posted December 9, 2017 Datalog from the AP and post here. Link to comment Share on other sites More sharing options...
Subie2.5i Posted December 18, 2017 Author Share Posted December 18, 2017 I'm guessing you have an injector issue. Maybe a harness issue, ill test that next chance i get but the the id1000 were just cleaned and flow tested by a local shop. Link to comment Share on other sites More sharing options...
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