Boost leak mystery

[cthomas5714]

Hey guys, so I am having somewhat of a mystery with my turbo where it refuses to build anything past 15lbs of boost and sounds as if there is a boost leak coming from somewhere. I have checked my charge pipes, intercooler, vacuum lines and even the exhaust side of things. Does anyone have an idea of where else it could be leaking from? It boosts a little slow to the 15 psi point and then it just sits there. It all started after I was running on my e30 tune and I did a muffler delete and it shot the boost up to 25lbs for a couple days. I'm not getting any smoke or anything so I seriously doubt the turbo is blown.

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[EcoSwag1990]

As someone else on here did, take it to an exhaust shop and have them do a smoke test on it to see where the leak is if there is one. I believe the person I'm talking about found the leak at the turbo and got it replaced under warranty

 

[TurboGlen]

I would check the bypass valve to see if it is stuck open or leaking by

 

[JungleG1337]

my leak was from a cracked IC. Smoke test it man.

 

[Noobtastic14]

Is it possible that the car is on "overboost" mode where it cuts boost and power temporarily?

-Drew

 

[Busser48]

Yes just had it replaced and I just say amazing!!!!!!! Night and day difference

 

[Busser48]

Smoke test smoke test smoke test!!!!! You will find your leak otherwise you will drive yourself nuts! Take my advice, smoke test the exsshust side to.

 

[cthomas5714]

Thanks guys, I guess a smoke test is in order for me in the near future. Hopefully the turbo isn't cracked. I know that ford would not want to warranty that after a tune and an aftermarket intercooler. Time to return to stock and hope for the best or just JB weld that sucker hahaha. That was a joke, I don't think that would actually work.

 

[Glenn G]

Return to stock tune and drive around a few days, Ford will probably not even notice the aftermarket IC unless that's the leak, an intercooler really can't damage anything and the stock unit is so poor that it's a greater risk to the engine leaving it in.

 

[lisandra]

Thanks guys, I guess a smoke test is in order for me in the near future. Hopefully the turbo isn't cracked. I know that ford would not want to warranty that after a tune and an aftermarket intercooler. Time to return to stock and hope for the best or just JB weld that sucker hahaha. That was a joke, I don't think that would actually work.

Did you solve this? Today on the highway i heard a nig psssst and now i cant go over 18 psi or so. Otherwise its running great

 

[cthomas5714]

For me it was just a coupler that I had to fix in conjunction with a very conservative tune at the time.

 

[show7ime]

Now that I think about it, stock what is the boost limit at? I can't recall.


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[TheWildman]

Now that I think about it, stock what is the boost limit at? I can't recall.

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The stock boost limit is around 18 psi IIRC.

 

[Impulsed7]

Not really a boost limit, but a demanded power limit. Cold temps will see less boost at the same power, so ~15-18 psi, but putting down the same power as stock at ~18-20psi. What you may think is power loss, is actually the same power at less boost.

 

[show7ime]

That's what I thought. So when a person complained couldn't go past 18psi (assuming stock) I was a little confused.


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