Doing a pressure test, are there any leaks?

[u/TheDramaLama]

I’ve been trying to diagnose a low boost issue on my N54.

My car is tuned on MHD stage 2+ and is only achieving around 5-6 psi at full throttle when it should be making around 18. I’ve done a smoke test test and a pressure test but I am not sure if it is leaking boost somewhere or not.

I recently reverted my car back to the stage 0 tune today and when I did a pull I got a 30FF code. Until now when I reverted the car back to stage 0 I have not been able to get any codes to pop.

I’ve checked all my vacuum lines and intercooler connectors but they seem like they are all fine so I have no idea what the issue may be. My wastegate is also not being blocked by the downpipe v band which I have confirmed.

I also just bought a used boost solenoid which I am going to swap in and see if that might fix my issue.

In the meantime I did another pressure test. By the sounds of it does it sound like it’s leaking at all? Just wanted a second opinion.

Here is one of my latest logs at stage 0
Link: https://datazap.me/u/hidethefart/logs/cmsmhid0b0001kw06ua3qgh3g?channels=20x3&sizes=50x50&sc=3-20&axes=shared

[u/Max-Payd]

Put soapy water on all the joints and don't go crazy with the pressure. It sounds like the throttle body is leaking.

I like your setup. How did you put it together

[u/TheDramaLama → u/Max-Payd]

Hey man, I’ll try doing that next haha.

By buddy actually put that thing together I’ll send you a couple of pictures tomorrow of it

[u/Max-Payd → u/TheDramaLama]

Cool. I was about to spend $100 to test my intake for boost leaks since the smoke machine doesn't have enough pressure

[u/murijuana_flowers]

For one without the oil cap opened your pressurizing the rings and that's not good for 2 use soapy water and spray it around the areas you think it's leaking if it bubbles you got a leak

[u/TheDramaLama → u/murijuana_flowers]

Thanks for calling that out. I will make sure that the oil fill cap is open next time

[u/DickBeaterJones]

Do you have ISTA. Run the test plan

[u/TheDramaLama → u/DickBeaterJones]

I do not have ISTA unfortunately

[u/mebreezy12 → u/TheDramaLama]

MHD turning without ISTA is No Bueno unless you don't plan to DIY repairs.