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turbo newbie needs help with blow off valve
Posted: Fri Dec 23, 2011 7:20 am
by Snow-Attack
Just bought 1992 touring wagon. has a td04 turbo, wrx top mount intercooler. the previous owner install a vent to atmosphere blow off valve which I believe is messing everything up. car is really doggy and has a code 22 and 23 and check engine light is always going on and off.. kinda smells like gas on occasion too.
got any ideas?
and what do i need to put it back to venting into the the manifold? detailed parts description would be great.
also the speedo cable is broke but i dont think that would affect anything?
thanks
Ben
Re: turbo newbie needs help with blow off valve
Posted: Fri Dec 23, 2011 7:23 am
by Snow-Attack
oh and it dies on occasion if you brake really hard... I think that comes back to the manifold pressure issue though?
Re: turbo newbie needs help with blow off valve
Posted: Sun Dec 25, 2011 2:34 am
by Mister Anderson
I have the same set up on my SS and have no problems with the BOV venting to the atmosphere.
http://legacycentral.org/library/literature/codes.htm
22 is the knock sensor
23 is the MAF
Oh BTW I have a 02-05 WRX IC. It is impossible to vent the BOV to the manifold. IF it's a 06-07 you should be able to do it.
Re: turbo newbie needs help with blow off valve
Posted: Sun Dec 25, 2011 3:43 am
by dscoobydoo
pics would help diagnose
Re: turbo newbie needs help with blow off valve
Posted: Sun Dec 25, 2011 8:27 am
by Snow-Attack
replaced the speedo cable. check engine light is gone seems to be running better to....
thanks for the info guys
Re: turbo newbie needs help with blow off valve
Posted: Tue Jan 03, 2012 7:47 pm
by Legacy777
The lack of speed signal can cause havoc with the ECU. I would recommend going back to a recirculating BPV setup over the atmospheric vent valve. Overall, the engine will run better with it.