[uhhmuhammed]

hey guys i ran stage 1 on my stock 335i n54 to test out how it feels it felt great but after a few pulls the car started feeling slow so i checked the codes and i had a 30ff code when i cleared it the car felt like how it first felt on stage 1 but after a few more pulls the same thing would happen again im lost on what to do i checked the charge pipe vacuum canisters and some vacuum lines car has 112k miles oem tourbos with waste gate rattel on start up any help would be appreciated (the code never shows on the dash mhd says it's a inactive shadow code but it comes back after i clear it)

[Luper52]

When I got a shadow 30FF code it was because the vacuum line going to the rear turbo was so brittle it was just falling apart. I know you checked some vacuum stuff but be sure to check the wastegate vacuum lines especially. Can't be seen from top of the engine. Just follow the lines with your hand.

[uhhmuhammed]

Originally Posted by Luper52

When I got a shadow 30FF code it was because the vacuum line going to the rear turbo was so brittle it was just falling apart. I know you checked some vacuum stuff but be sure to check the wastegate vacuum lines especially. Can't be seen from top of the engine. Just follow the lines with your hand.

alright will do i checked the easily seen vacuum lines im hoping it's something simple it just makes no sense to me how it builds boost for multiple pulls then just gives up 🤔 but thank you for the help

[jadams161]

Change all vacuum lines and the plastic ones over the valve cover. Get good silicone line.

[Luper52]

Yes most people go with Verocious 3.5" I.D. Silicone Vacuum Lines https://www.verociousmotorsports.com...ld-by-the-Foot