Low Boost, what's causing it? - Ford Powerstroke Diesel Forum
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Old 02-26-2012, 02:20 PM
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Low Boost, what's causing it?

Howdy, my 02 is running great, just not making a lot of boost, and is hissing very loudly once I let off the gas. It makes 14 psi at WOT and around 3-4 at 70 mph. I don't have high EGTs, so I don't think it's my EPBV. But just to make sure, I unplugged the sensor anyway. The boost jumped up to ~18 psi at WOT, but it's still not full boost, and my EGTs shot up to around 1000. Also, the loud hissing noise is still there. I plugged the EPBV back in for now, but I wanted to see what y'all think my problem might be.

Last edited by GulfcoastStroker; 02-26-2012 at 02:37 PM.
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Old 02-26-2012, 02:54 PM
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sounds about right for canned tunes
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Old 02-26-2012, 02:56 PM
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Will that make the turbo hiss like that? And I thought we made ~20 psi stock. I figured I'd make around that.


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Old 02-26-2012, 02:59 PM
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well all trucks are different, but your egt's sound good if your only getting up to 1000, hope thats pre turbo though
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Old 02-26-2012, 03:00 PM
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what kind of hissing noise? Is it more like a intake noise or are you thinking you are having a boost leak
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Old 02-26-2012, 03:02 PM
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Yea my EGTs are low. It usually is around 800, but hit 1000 when I unplugged the EPBV.


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Old 02-26-2012, 03:02 PM
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Quote:
Originally Posted by GulfcoastStroker View Post
Yea my EGTs are low. It usually is around 800, but hit 1000 when I unplugged the EPBV.


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where is your egt probe?
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Old 02-26-2012, 03:03 PM
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I can't tell if it hisses all the time, but it hisses loudly whenever I left off the gas, like the turbo is unspooling.


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Old 02-26-2012, 03:11 PM
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It looks to be tapped pre-turbo. They were on the truck when I bought it.


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Old 02-26-2012, 03:19 PM
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Its in the right spot, you can build a boost leak detector cheap with parts from lowes or home depot but your egts sound great. Its hard to know what kind of sound your explaining, maybe post a vid.
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