so my car has recently gone through some repairs, to include a new WGA and BOV. but when everything was put back together, it wouldnt even make stock boost levels. Im using the Greddy profec spec II. at WOT i can manage to make 18 psi and then it will drop down to 7-9 psi. i then hooked the stock boost solenoid back up, and it wont even spike, it boosts to 10 psi and holds steady. and with all boost controlling devices disconnected, running simply off wastegate, i can make 23psi and it will hold steady. anyone have any suggestions to make my EBC functional again?

 

I was about to suggest that you toss the EBC as high as you can vertically and let it land on concrete. But, that would be cruel. Instead of trying to make it functional again, I would replace it with a MBC.

Seriously though, what BOV did you install versus what BOV did you have on there before? Did you switch from one brand/type of BOV to another? Also, what WGA are you now using and what WGA did you use before switching?

You mentioned running, "simply off wastage". What do you mean exactly? How did you have the boost/vacuum hoses routed and connected to achieve this condition? Finally, would you please post up your complete mod list. Is it a stock turbo, exhaust mods, intake mods, etc.? Be thorough and don't leave any mods or equipment off the list.

Something sounds funny to me. If everything is hooked up correctly, there is no way that you can be seeing 23 PSI spring pressure and 8-9 PSI with everything hooked up again. That is like, duh. Do you know what I mean? I don't think that you are actually seeing 23 PSI on spring alone. If that were true then there would be no way for it to drop down to 9 PSI. How is that possible. Think about what you are saying.

Can't you just throw away all the EBC and other crap and run your car at 23 PSI? JK. LOL.

 

mods list:
Greddy profec spec II
Forge BOV
Forge wastegate actuator
AEM intake
Injen I/C pipes
Turbo back exhaust

im using the stock turbo, and i found out why i hit 23psi, it was because the vacuum line slipped off the WGA nipple. lol but as far as the line connections, one line from the WGA to the corresponding EBC port, on line from the boost source to the corresponding EBC port. it seems to me that the EBC is not holding the boost at the set level. i went from the stock wastegate to the forge, and a greddy type s bov to Forge. after these changes, my EBC wont "control" the boost. its hooked up exactly how the owners manual depicts.

last night i made some changes, disconnected the vacuum lines from the EBC, and ran one line from the boost source to the wastegate. i only see 11psi max. ive got a Perrin MBC on the way. gonna see if that fixes my problem...

 

Have you tried checking for a boost leak?

 

yep i checked for boost leaks. no leaks up to 30 psi. all silicone couplers have been matted to the pipes via silicone gasket maker and clamped down as tight as possible without breaking the clamps.

 

What exactly are you using as the boost reference source? Is it "T-eed" into the hose that runs from the IM to the BOV? Or alternately, are you using the J-Pipe(compressor discharge pipe) nipple?

Look, 11 PSI is base WG pressure on the stock turbo. Can you tell where this discussion is headed?

 

You definitely need to adjust the length of the threaded waste gate actuator rod. By rotating the turnbuckle mounted on end of the rod inward clockwise you will effectively shorten the overall length of this rod.

The shortened rod will pull harder on the spring inside the WGA's canister which will pull the flapper valve down onto its seat on the turbine housing. Otherwise, as currently setup, the flapper valve is lifting fully open at 11 PSI, thus bypassing most of the exhaust gas flow.

 

Forge actuators are fine units. However, they sometimes need to be tinkered with to set them up to work properly. Sometimes the actuator rod as delivered is too long. This would require some cutting.

If you loosen the backup nut behind the turnbuckle and mark its current position on the threads then you can always reset it to this reference point later if need be. I don't know if you are game for adjusting this piece. Let me know.

 

on the adjustment rod, there isnt much more threading to work with on it. maybe half an inch. all i know for certain is the fact that after the shop started swapping around parts to include the new WGA, once i got my car back the EBC wont hold it at any set boost level other than 0% or 10 psi. i hooked the WGA up to the stock boost solenoid and i saw the same results.

*correction i ordered the Hallman pro mbc instead of Perrin*

once i get my mbc in the mail, im hoping for some progress, if not, ill definitely be adjusting the WGA rod. since a boost controllers purpose is to raise boost above wastegate spring pressure, ill start off with that.

 

the hallman pro fixed my issue.