New MST V3 Leaking Air like Crazy

[rowdy]

I just installed a new MST V3 intake and did a smell test after and was surprised to see how much smoke is spewing everywhere.

I followed the instructions and referenced an install video and kinda confused on why this is happening.

I sent a message out to the dealer to hear their thoughts, but since it’s the weekend i won’t hear back till Monday. It being my daily I’m posting to see if anyone has thoughts or recommendations that could help me out sooner with getting it all sealed up. I did see on another thread that some didn’t use that metal piece on the turbo inlet, but I’m surprised they still include it and have it listed in the directions if it wasn’t intended to be used.

I’m also leaking at the air temp sensor and for the life of me I can’t think why it’s doing. There is no tightening room left and I can’t press any deeper to seal. Appreciate any advice on this one too

Thanks!

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[SupraSmashedBro]

For the turbo side, did you reuse the rubber o ring from the OEM turbo inlet?

What made your test for a leak? Did it throw a check engine?

 

[rowdy]

For the turbo side, did you reuse the rubber o ring from the OEM turbo inlet?

What made your test for a leak? Did it throw a check engine?

Yup, transferred the o ring and it looked fine and was lubricated by oil.

I smoke tested as I was investigating why the car was acting up and data logging showed that a potential reason was from boost leaks so yeah revealed a ton of leaks that i’m trying to patch up. no engine codes when i drove after install, only appeared in the data logs.

 

[BumbleBoi]

Yup, transferred the o ring and it looked fine and was lubricated by oil.

I smoke tested as I was investigating why the car was acting up and data logging showed that a potential reason was from boost leaks so yeah revealed a ton of leaks that i’m trying to patch up. no engine codes when i drove after install, only appeared in the data logs.

The boost leak would be coming from your charge pipe side.
The intake/turbo inlet side is the vacuum side.
Your smoke test pictures show a vacuum leak, I.e. Car taking in unfiltered air instead of boost leaking.

 

[razorlab]

Yup, transferred the o ring and it looked fine and was lubricated by oil.

I smoke tested as I was investigating why the car was acting up and data logging showed that a potential reason was from boost leaks so yeah revealed a ton of leaks that i’m trying to patch up. no engine codes when i drove after install, only appeared in the data logs.

None of those would make the car act weird. That whole section is never under positive pressure. The Supra doesn't use a MAF and is basically speed density.

Under vacuum I am sure all those bits seal nicely.

 

[SupraSmashedBro]

None of those would make the car act weird. That whole section is never under positive pressure. The Supra doesn't use a MAF and is basically speed density.

Under vacuum I am sure all those bits seal nicely.

So even though it is leaking during a smoke test, you don’t think it would be an issue when for performance/when the car is actually running?

 

[i3igpete]

No, the charge pipe and manifold sensors would give correct pressure readings regardless of a pre-turbo leak. Additionally, the preturbo temperature sensor (its not a MAF sensor on b58tu engines) gives the same reading whether it sees 100% or 10% of the incoming air.

 

[rowdy]

ah well i ended up just mating the silicon to the inlet and removed the metal piece all together. It’s tight in there but sealed up now. I did have a leak in the charge pipe but pretty confident it is patched up. There was smoke come from where the charge pipe meets the turbo so i removed the bottom half (AA charge pipe) and cleaned it out. really dirty and cleaned the o ring and reapplied oil. Some smoke still coming out of the mating of charge pipe to turbo but i guess it’ll seal if i'm understanding right while running?

To give further context the car had a flashing check engine light and the tach went dead, car still worked but then rpm was not visibly moving. The car then stalled when i went into park. This was while in MHD OTS stage 2. I reflashed to stage 0 and haven’t had the issue since and been trying to data log and use ai to help understand it as i’m not well versed. been trying to also use @razorlab new site to read logs and trying to learn on it as maybe there is something else wrong. i think i might pull sparks next to look at them while i diagnose.

 

[razorlab]

tach going dead has zero to do with all those other things. You have battery and/or wiring issues.

Have you done a deep scan with appropriate software?

 

[rowdy]

tach going dead has zero to do with all those other things. You have battery and/or wiring issues.

Have you done a deep scan with appropriate software?

Hmm okay, i guess in a way that’s good to know. I can focus on troubleshooting somewhere else.

All i have for me to use is the MHD app for data logging and code checking. been using AI and your site to make sense of the numbers.

If there is other software to be using, what do you recommend? Appreciate your help btw

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