Stop boost at 15 psi

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May 14, 2012 | 09:52 PM

LaBlacky

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Joined: May 2011

Posts: 19

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From: San Antonio

Stop boost at 15 psi

Hey guys I'm stuck on this !!!! My truck just started doing this about a week ao, when I am driving shifting trough the gears, the turbo only shift s to 15 psi. Then it's like the turbo stops working, I usually get 23 - 25 psi WOT. I have checked the IC boots and they look fine. Please help.

May 14, 2012 | 10:12 PM

INFRNL

Cargo Master

Joined: Apr 2012

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From: Bottom Of Pikes Peak

possible exhaust leak, intake plenum leak, wastegate faulty, wastegate solenoid. Do you have AE, might have to check for codes/monitor truck.

May 14, 2012 | 10:18 PM

snakedoc

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Joined: Jan 2009

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From: AL, Reform

how about the boots under the spider.
and my truck dose not have a leak that i can find and all it will do is 19psi.

May 15, 2012 | 04:57 AM

Tugly

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Joined: Jan 2011

Posts: 18,849

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From: Puget Sound

Quote:

Originally Posted by snakedoc

how about the boots under the spider.
and my truck dose not have a leak that i can find and all it will do is 19psi.

Did you pull the red line off the wastegate above the turbo and plug the red line?

LaBlacky - Starting simple...

Air filter good?
Check for black soot around exaust parts from the block to the turbo (cold). If you find a suspect item, you can start the engine and quickly put your hand near the item to confirm before things warm up. Listen for a loud exhaust "tick" while running.
Take 3" PVC pipe about 8" long with a PVC cap glued to it. Drill and tap a hole in the cap for a tire stem valve, and maybe a gauge. Unplug the hose to the air filter and insert the PVC pipe, and clamp it. Gently air up your turbo to about 15 PSI and use a spray bottle with Simple Green/water mix to find air leaks.

May 15, 2012 | 07:33 AM

LaBlacky

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Joined: May 2011

Posts: 19

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From: San Antonio

Thanks Guys for the tips. I have checked the IC boots and they all look good. I am still new to this so I do not know what AE means can some one explain. I have checked the air filter, evan ran it around the hood with the air filter taken off to make sure, but still the same thing. I wouldn't be so worried if I was running the programmer in stock mood, but since it is in the high performance setting I would get around 23-25 psi. You can all feel the loss of boost when you get the 15 psi, its like the turbo just shuts down. I will disconnecting the red line to the waste gate to see what does. I will let you know what happens later on this afternoon. Again thanks for all the help.