Now that I have figured out how to hook my AVCR boost controller to my HKS external wastegate(thanks to Chevyeater and a couple others on Supraforums), I still can't figure out why I'm overboosting. I decided to eliminate my boost controller and just route the vacuum line from the turbo compressor port straight to the side port of the wastegate. I figured this would regulate boost to the standard spring pressure(which is 16psi according to the former owner). Unfortunantly I can't hear the wastegate open until way past 20psi. Does anyone have any other advise on how to check to see if the wastegate is working properly? Thanks..
HKS wastegate problems??
- Thread starter MRSUPRA
- Start date
MRSUPRA said:
ICBW, but it sounds like the spring you have is holding the WG closed until you hit 20psi. If that's the case, you'll have to buy another spring. An AVCR doesn't open the waste gate, it delays it from opening.
I
itr206
Guest
Im sure you can feed pressure from a compressor into the WG to see at what exact pressure it opens up. Or take out the spring and check it out. See what its really at
you have it at the right port on the wg? the lower one (towards the bottom of the vavle?)
is it a realy Hks wg or a copy?
is it a realy Hks wg or a copy?
I
itr206
Guest
yea i was meaning when he bypassed the ebc.. but read he put it to the side port in his original post so i gotitr206 said:
wned: lolYeah, without the AVCR solenoid connected, I have it hooked up to the bottom(side port) of the wastegate. I just left the top port open for now.
With the AVCR hooked up: I had the NC port hooked up to the the T with one line going to the compressor housing and the other line going to the bottom port of the wastegate. Then the COM port went to the top of the wastegate.
With the AVCR hooked up: I had the NC port hooked up to the the T with one line going to the compressor housing and the other line going to the bottom port of the wastegate. Then the COM port went to the top of the wastegate.
I can't tell if you have the w/g plumbed correctly, because what I consider "top" port may be you bottom port and vice versa. Reference the APexi web site for more details: - http://apexi-usa.com/pdfInstallation/21.pdf (page 48 for external w/g).
Which HKS W/G are you using?
If the "high boost" problem persist after plumbing verifcation, then you'll need to remove the w/g and disassemble it to investigate what spring you have. All the HKS w/g springs are color coded w/r to spring pressure.
HTH
Which HKS W/G are you using?
If the "high boost" problem persist after plumbing verifcation, then you'll need to remove the w/g and disassemble it to investigate what spring you have. All the HKS w/g springs are color coded w/r to spring pressure.
HTH
MRSUPRA said:
yea its hooked up correctly. I would get a air compressor and test to see where it opens w/ it off the car...MRSUPRA said:
Just as a little follow up.. I removed my wastegate last night. The wastegate looked to be funtioning fine with no sticking or too high spring pressure. I was stumped until I noticed a little sctach on my vacuum line thats connects to the side port of the wastegate. Well, it turned out that the scratch was a big slice going all the way through my brand new silicone vacuum line. It must have happened somehow when I was installing it. Oh well, its fixed and working now!!
