Subaru Enthusiasts Car Club of the Sierras - View Single Post

Dean · 2010-12-03, 09:04 PM

OK, I still have one weirdness I can't figure out.

The car stumbles either transitioning from closed to open loop and/or it hits 9ish PSI boost, not sure which. It is pulling hard and then abruptly decreases the rate of acceleration.

Cleaned the MAF and checked all the vacuum lines. O2 numbers appear fine, but it also appears to happen just as A/F goes from near stoic to 12:1 which is why I also mentioned closed to open transition.

Stock base map with TGV CELS disabled. Tried Stage 2 real time with no change.

I think 9ish PSI is wastegate spring pressure. Right?

I was thinking boost solenoid, but it appears to work fine. Not sure it can maintain duty cycle, but it opens and closes fine. I flushed it and all the lines in case they ingested something. The pill is on the correct side of the T (High pressure side).

Anybody got a known good spare solenoid or one I could borrow to test with?

It is weird though, sometimes it goes right through 9psi, especially in I think 4th gear.

2010-12-03, 09:04 PM	#112
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	OK, I still have one weirdness I can't figure out. The car stumbles either transitioning from closed to open loop and/or it hits 9ish PSI boost, not sure which. It is pulling hard and then abruptly decreases the rate of acceleration. Cleaned the MAF and checked all the vacuum lines. O2 numbers appear fine, but it also appears to happen just as A/F goes from near stoic to 12:1 which is why I also mentioned closed to open transition. Stock base map with TGV CELS disabled. Tried Stage 2 real time with no change. I think 9ish PSI is wastegate spring pressure. Right? I was thinking boost solenoid, but it appears to work fine. Not sure it can maintain duty cycle, but it opens and closes fine. I flushed it and all the lines in case they ingested something. The pill is on the correct side of the T (High pressure side). Anybody got a known good spare solenoid or one I could borrow to test with? It is weird though, sometimes it goes right through 9psi, especially in I think 4th gear. __________________ I am a Commodore PET --- Now get off my lawn you kids...