Do I have a Boost Leak?
Thread Starter
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Freshman User
Joined: Aug 2012
Posts: 30
Likes: 0
From: Raft Island, WA
Do I have a Boost Leak?
new diesel owner, 2000 f350 cc auto 4x4 136xxx 7.3
Just installed gauges and im getting 13-14 psi wot is this right?
Is there a way to test it?
Stock exhaust,6637 no tuner or other mods
Any help would be appreciated thanks
Just installed gauges and im getting 13-14 psi wot is this right?
Is there a way to test it?
Stock exhaust,6637 no tuner or other mods
Any help would be appreciated thanks
Locomotive breath
Joined: Jan 2006
Posts: 1,354
Likes: 1
From: Mid Oh. Ponderosa
Hi and welcome. You should be getting 17-19. Check all I/C boots for tightness, look for soot around the up-pipes behind turbo, around exhaust manifolds, these are very common. Exhaust leaks will cause low boost and poor economy.
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Best way to test for boost leaks would be to pressurize the system, a 4"PVC cap with a schrader valve works good connected to the intake tube...Search "Boost Leak Detector" for ideas.
See what you get if you unplug the wastegate line as well, the red line going to the top of the turbo area. If boost goes up considerable you could adjust the wastegate arm.
See what you get if you unplug the wastegate line as well, the red line going to the top of the turbo area. If boost goes up considerable you could adjust the wastegate arm.
Thread Starter
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Freshman User
Joined: Aug 2012
Posts: 30
Likes: 0
From: Raft Island, WA
Okay. So the first thing i did was check the vaccum hose going to my boost gauge for "kinks" and I did find one. After i cut the fitting back on i test drove it and same thing 13-14 psi wot. I couldn't see and soot stains so i guess the next thing to do is the pressure test.
question: Could a faulty wastegate cuase low boost?
thank you
question: Could a faulty wastegate cuase low boost?
thank you
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
The wastegate is designed to start to bleed pressure off IIRC at about 5psi factory. Many tighten the actuator arm, or unplug the red line for the wastegate to allow pressure to build higher. It's not so much that the wastegate is faulty it's that it is doing what it is designed for.
Tuned
Joined: Apr 2011
Posts: 406
Likes: 5
From: Fox Island, WA
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Freshman User
Joined: Aug 2012
Posts: 30
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From: Raft Island, WA
Not yet. Today ill be heading to the depot to pick up the parts for the pressure test.
Then ill be underway if Emma isn't to needy.
Then ill be underway if Emma isn't to needy.
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Thread Starter
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Freshman User
Joined: Aug 2012
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From: Raft Island, WA
All right.
Today I went to home depot and picked up all the parts I needed to do a pressure test, hooked it up into my intake tube, cranked it up to 15 psi, and started spying my soapy water solution on all the boots, and anywhere else trying to find a leak. I found Nothing. But I did hear a hissing like air was escaping from somewhere over near the waste-gate. But neither my water soapy solution or my hands could pin point the leak. Was that hissing the waste-gate? If you pressurize the system with compressed air should the waste-gate realize pressure? Or is that the leak I have been looking for?
Im stuck and don't know where to turn.
Thanks for all the help and ideas thus far guys.
Today I went to home depot and picked up all the parts I needed to do a pressure test, hooked it up into my intake tube, cranked it up to 15 psi, and started spying my soapy water solution on all the boots, and anywhere else trying to find a leak. I found Nothing. But I did hear a hissing like air was escaping from somewhere over near the waste-gate. But neither my water soapy solution or my hands could pin point the leak. Was that hissing the waste-gate? If you pressurize the system with compressed air should the waste-gate realize pressure? Or is that the leak I have been looking for?
Im stuck and don't know where to turn.
Thanks for all the help and ideas thus far guys.
