My boost only 3 psi... help please :(
 

Hi everyone! the first thing is sorry for my english (i´m from Spain and is really complicated speak english for me.)

I have a problem with my boost, has maximum 3 psi... 4psi sometimes. The last owner made a simplification of the rat nest. Exactly the next pic:


https://cimg1.ibsrv.net/gimg/www.rx7...9b4de78785.jpg

and I felt slow the car so,

I installed a power FC with commander, and finally a boost controller (GREDDY PROFEC OLED):


https://cimg5.ibsrv.net/gimg/www.rx7...b90e3d4be1.jpg


This is my setup (VERSION 2):


https://cimg0.ibsrv.net/gimg/www.rx7...e40b7ead29.jpg

Maybe I installed bad the solenoid?? this configuration is right? or the exiting source input is in the front port?


https://cimg3.ibsrv.net/gimg/www.rx7...93f7ae42e.jpeg




I´m not sure what is the problem, I checked y-pipe, and the hoses from boost to manifold (maybe not really good check... :lol: because I´m not sure how to do it).

I can hear the turbo working, and the blow off sound very strong....

So, can someone help me?? What can I try?

Thanks a lots!:icon_tup::icon_tup:

The front port 3 is for plumbing in an external wastegate

Hi Chechist,
Does your max PSI stay constant throughout the whole rev range?
If so, it could be a boost leak or even a blocked CAT that is hindering flow.
Still running the stock blow off valve (BOV)? It may be leaking.
There are many things that could cause a low boost issue. Its especially harder if the rats nest has been messed with.

Thanks guys! Finally I find a really big crack in the intercooler pipe! But I could to see the crack with poor pressure.

I bought items and I made a handmade tester:

- Bottle of wine.
- Bottle of cappers (for cap)
- Cheapest air pump.
- Cheap Shisha

https://cimg2.ibsrv.net/gimg/www.rx7...fa7dbc0339.jpg

And..... TADAAAAAA!!!

https://cimg5.ibsrv.net/gimg/www.rx7...94c3e74712.jpg

and after push with my fingers:


https://cimg6.ibsrv.net/gimg/www.rx7...a8c8305cff.jpg


So... 3psi for this crack not bad! :lol::lol::lol:

Nice !, glad you were able to find the issue. Some innovative troubleshooting there. :)

:) me allegro que lo encontrastes. Finally enjoy your car 👌

Thaaanks guys! I hope that this rare solution will helps others.

Yo también me alegro ! :D :D Only I need to wait new HKS pipes!

Never thought I'd see a car hitting a bong/hookah before. Glad I came here today lol

HAHAHAAA :lol::lol::lol::lol::lol: