1999 - 2003 7.3L Power Stroke Diesel

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Old

Nov 13, 2006 | 10:16 PM

#1

John311t

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Boost Problems

I cant seem to figure this out. My truck will sometimes run full boost, 25psi and other times it will see 18psi. It seems that if its hot it will never run full boost but when its warming up it will see it 25 and sometimes it will only see it 18psi. Im not throwing any wastegates codes so i belive that its okay. Any suggestions on what to check?

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Old

Nov 14, 2006 | 05:16 PM

#2

cookie88

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From: Cabot, Arkansas

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When the engine is cold the timing is advanced and the oil pressure is higher. 18 is probably closer to your "normal" boost.

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Old

Nov 14, 2006 | 08:20 PM

#3

John311t

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That is with the Evolution on Race. I would think the truck should build more boost then 18psi with it being chipped.

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Old

Nov 14, 2006 | 08:25 PM

#4

Uzumati

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From: Central, Al

Have you checked for any boot leaks?

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Old

Nov 14, 2006 | 08:44 PM

#5

John311t

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How would i go about doing that? I did a visual inspection and everything seemed tight with no rips. How would i test it to be sure.

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Old

Nov 14, 2006 | 08:48 PM

#6

Uzumati

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From: Central, Al

If they are oily take them off and clean them and the tubes. to keep them from getting oily look into the ccv mod

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Old

Nov 14, 2006 | 09:01 PM

#7

John311t

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I have done the CCV mod. If my boots were bad would i be able to see them?

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Old

Nov 15, 2006 | 07:13 AM

#8

Kwikkordead

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From: Rio Rico, AZ.

Got a boost pressure regulator valve? You might be defueling.

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