Hi Guys,

So I'm running into a bit of an issue with holding boost. Whenever I'm in 3rd gear or higher and go WOT, my car will build 10psi and quickly drop down to 5psi and slowly start climbing back up until it builds back up to full boost... I have been trying to find the problem now for the last couple of weeks with no luck.

Another problem I'm also running into is, when I was getting the car Tuned anything passed 10psi the car would fuel cut. Car runs strong and 1st and 2nd gear do not have any issue whatsoever.

Thanks in advance!

We made 310whp at 9 psi.

Mod List:
Intake
Full Exhaust
Power FC
Walbro 255

 

First problem sounds like the area where most turbo problems are with the twins: the sequencing of the second turbo. The CCA can be "lazy" and not open quickly enough. If not that I would consider the precontrol and turbo control actuators.

If you don't get help with the second question, you can post it in the 3rd gen section. With a full exhaust trying to go past 10psi, I would think you need an injector upgrade, at least on the secondaries. But my experience is limited in that area.

 

https://www.rx7club.com/3rd-gen-arch...attern-242320/