Good morning, i'm having an issue with my setup which is as follows:

- JMTC 47mm turbo
- Alta IC
- Catless DP with 3" exhaust
- Manic stage 3
- Forge BOV
- 1 step colder plugs
- Blocked PCV as per Tiger venting to atmposphere

Overall performance feels good when im not getting on it hard say 1/2 to 3/4 throttle, but when I go fully WOT the BOV starts to vent boost randomly in short bursts affecting the performance. One other detail is that my CEL is on and it is a catalyst emission code my manic tuner is checking that issue next week but I dont think it has something to do with what is happening. Any ideas?

 

With Forge BOV, there are different springs for different boost pressures. Sounds like you have the softest spring installed... You should have at least the Yellow spring installed.

https://www.forgemotorsport.com/Valv...duct--826.html

Valve Spring color coding:
Green - 5-15 PSI
Yellow - 15-23 PSI
Blue - 23-30 PSI
Red - 30 + PSI.

 

I actually installed the Blue spring that came with the kit, do you think it might be a little overkill and go back to yellow? Im not pushing more than 23 psi...

 

The Forge does still use the factory valve controller... Maybe the ECU pressure controls are pulling the valve?

 

Im more inclined towards the ECU messing with the bov for some reason, the current spring operates ok, it always vents when I let off even at 1/4 throttle..

 

I went to a bigger turbo and might be having the same issue. Any chance it sounds like this when its dumping boost?