Well it's been 6 months since I got the GReddy ProfecB SpecII and installed it. The first time it would either stay at 7PSI or boost way over 15PSI depending on whether the safety boost solenoids were plugged in. I gave up and installed a $20 Turbotech which worked brilliantly and held 12PSI with no problems or boost spikes Today I went and ran new lines to the passenger side wastegate actuator and to the y-join on the drivers side. Both safety boost solenoids are bypassed now. I've connected the line to the actuators to the COM port and the line to the intercooler boost source to the NO port as explained in the manual. (I had it this way the first time too) It still will not go past 7PSI no matter what settings I choose on the controller. Duty cycle of 5% or 65%, doesn't matter. The tt.net post suggested to have all other setting as low or at 0 as possible. I did this, and I also tried various settings for gain and set gain... I've tried searching but couldn't get any results for my query... maybe I wasn't using the right words. Why won't it go past 7PSI? Also when I blow into my new lines running to the actuator there are absolutely no leaks, but when I blow into the intercooler source there is very little resistance. I figured this was OK but I thought I'd check too. Thanks, Kieren.
It is 'base boost' in my case as the safety boost solenoids are bypassed. The turbotech holds 12PSI so this would indicate a problem relating to the ProfecB rather than the mechanics of the car?
manual vs ebc.. seriously remove the stock solenoids bro !!! and run the lines directly 2 the gates !!.. unless you have messed your lines up or something !! that could cause dodgy boost
I have! The lines run straight through, without restriction, from the wastgate actuator to the EBC solenoid.
The solenoids have no vac lines coming to or from them. The other lines that went to them from the accordion pipe are plugged. They are also unplugged and have been since March.
Plumb it up like this Com port to both actuators NO port to the plenum, not where the manual says Vacuum signal line from the unit to the plenum also Coming off the centre on the balance tube is a 6mm tube, it finishes up just above the iacv, run a hose from this to both the solenoid and the unit. Set it up and your done. As you said, the turbo tech makes the desired boost so there is no reason the greddy shouldn't if set up like I have said. I think you may have one boost port wrong in your set up. Do it as above and you will be all smiles.
Yep matches the boost gauge. Well at least I have shorter vac lines now. That vac line you suggested to use was already blocked off -the 6mm hardpipe that comes off the centre of the balance pipe and ends near the battery which is the one I used. There is no plug on the NC port of the solenoid - check! The vac pressure line goes from the balance pipe to the solenoid NO port and the control unit itself - check! Equal length vac lines from wastegate actuators to a T-piece then connecting to the solenoid COM port - Check. All connections on the back of the control unit are OK... Where am I gonna find another solenoid? I give up..... waste of a weekend!
Yep but I'm not putting it back in... not anytime soon... Z will just sit in the garage for a while I guess as punishment for wasting my time.
Hook 15 psi upto the boost controller, you should hear the solenoid start to click. Its a fast clicking sound.
I wish... the compressor at work seized up so now I have no way of doing that or even a boost leak test... How much pressure can you produce by blowing? lol...
