View Full Version : boost problems with my 20g :(

04-01-2013, 01:54 AM
I have been having this issue with my 2nd gen 3sgte car. I have the ATS 20g setup with a external waste gate which is simply vented to the atmosphere. When I took it out for the first time in a while it was reading boost levels of 22-25psi which is not normal. I have a 10psi spring in my 38mm tial waste gate with my boost controller makes 17psi. It would spike in every gear.

So I took apart the waste gate and purchased two new springs the large red and small red which adds up to about 17.5 psi and connected the waste gate directly to the turbo compressor to rule out the boost controller.... and I am still having the same issue with it over boosting.

Has anyone ever ran into a similar issue or have any suggestions for troubleshooting? I just ordered a new diaphragm today it should be in by weds. So far I have removed the boost controller and ran it off of just the waste gate. I have tried only the 10psi spring and only the 7.5 psi spring still with the same result. I have tried different vac lines and two different boost gagues. If the diapgragm doesnt work I am not sure were to even go from here? Heres a few photos...




04-01-2013, 05:16 AM
I would guess leaking diaphragm so I think you'll be alright.