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Not Making Boost!!!!

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Old Nov 22, 2005 | 05:26 PM
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From: houston
Default Not Making Boost!!!!

So I just got back from San Antonio. Went to see allen and put in some dyno time and get an 02 pcm.
first run the truck made...

25xrwhp(don't even remember exactly) and 310rwtq

He was like what gives bc the A:F was not right,

he hooked up a boost gauge he had laying around and low and behold the sidemount is registering a whopping 2psi

2 PSI!!!!
I do not know where to start so if anyone has any guidance or experiance with this please post.
Im really disappointed in my results
but I have to give it to allen despite the bad news he still tuned the truck and it is indeed running harder.
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Old Nov 22, 2005 | 05:43 PM
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Lets start with what size pulley do you have?
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Old Nov 22, 2005 | 06:03 PM
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it is a 3.3
im not sure how many miles are on the blower i bought the truck used.
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Old Nov 22, 2005 | 06:10 PM
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Originally Posted by Gmc²
it is a 3.3
im not sure how many miles are on the blower i bought the truck used.

sounds like the right size pulley....hmmm, have you looked at the bypass actuator? is it working?
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Old Nov 22, 2005 | 06:21 PM
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not sure how to tell,
if it is supposed to move in sequence with the tb then yes it does its thing i think.
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Old Nov 22, 2005 | 06:24 PM
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well, a 3.3 on the 90 and a 5.3L motor should be good for about 4-5 psi.....how does the blower sound?
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Old Nov 22, 2005 | 06:25 PM
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sounds extremley good, it whines and it made over 300 #s of tq from 2500 on
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Old Nov 22, 2005 | 06:27 PM
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headers, exhaust?
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Old Nov 22, 2005 | 06:28 PM
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gibson cat-back
stock manifolds,
stock airbox w k n drop in and big whole in airbox,
also has the 30# injectors
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Old Nov 22, 2005 | 06:30 PM
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Originally Posted by Gmc²
gibson cat-back
stock manifolds,
stock airbox w k n drop in and big whole in airbox,
also has the 30# injectors

hmmmm.....sounds fishy to me.....The only thing I can suggest at this point is to consider sending the supercharger in....we can also discuss a possible trade in for the sidemount via telephone tomorrow if you would like.
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