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BOOST?????????HELP!!!!!!!!!!!!

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Old May 13, 2010 | 07:04 PM
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BOOST?????????HELP!!!!!!!!!!!!

A friend of mine has an e99 with a boost problem it wont build more than 25 psi it has a set of glow shift gauges we have checked the gauge with air psi and it seems to be working fine no leaks in the hose.It does have a fooler in line kinda leaning towards it but dont know...It seems to run a little weak was pulling 25 plus psi no problem all ic conections seem to be tight ANY IDEAS about to pull my hair out over this deal and I dont have much THANKS IN ADVANCE
 
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Old May 13, 2010 | 07:44 PM
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Is he running any tunes? 25psi on a stocker is pretty good IMO the truck defuels at 23ish psi
 
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Old May 13, 2010 | 08:13 PM
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TS Tunes was getting 20-25psi easy now 12psi max.tunes are 50-75-100-140-stock-high idle the 12 psi is in any of the tunes
 
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Old May 13, 2010 | 09:22 PM
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Ok you didnt say that you were maxing out at 12 psi. Make sure that your boost line is not pinched feeding the guage. It sounds like a boost leak to me. You may want to build a boost leak detector to check. Have you looked at the turbo compressor wheel? Has any work been done before the drop in boost pressure?
 
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Old May 13, 2010 | 09:34 PM
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LOL sorry just noticed that I forgot the 12 psi deal.We have checked the line and there is no problems with it.The compressor wheel is good and no play in the turbo and no work has been done to the truck since the drop in the pressure
 
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Old May 13, 2010 | 10:26 PM
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May be a split boot, any extra smoke when its only making 12 psi? If so what color is the smoke.
 
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Old May 14, 2010 | 06:18 AM
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No extra smoke we have checked all boots 3 times ic pipes dont seem to be leaking either
 
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Old May 14, 2010 | 06:20 AM
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Make a boost leak detector check from there. How do the up pipes look? What type of fooler is in the line? Is it an air reg that will limit the PSI that the map sees? or is it a bleeder valve that will bleed off excess psii?
 
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Old May 14, 2010 | 06:38 AM
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No soot at up pipe connections they look good.The fooler is the type with a bleeder in it not sure of brand it is only a couple moths old
 
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Old May 14, 2010 | 06:43 AM
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By pass the fooler maybe it is dumping to early?
 
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Old May 14, 2010 | 07:02 AM
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That was our next try but we didnt have the right fitting or a piece of hose we will try that today after work THANKS for your ideas please keep them comming
 
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Old May 14, 2010 | 07:18 AM
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Hows the line connection going to the gauge on the back? Deff. build a boost leak detector, it'll help a ton!
 
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Old May 14, 2010 | 07:36 AM
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If there's no smoke and you're only making 12psi with tunes, you don't have a boost leak. Check your gauge hookup or possibly the gauge itself.....
 
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Old May 14, 2010 | 09:31 AM
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I never saw any mention of a loss of power. Seems to me like if all you can get is 12psi and youre used to getting 25psi, you would feel it in your butt. If you don't notice any loss in power then its most likely a gauge issue.
 
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Old May 14, 2010 | 11:54 AM
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welome to the crowd man, ive been chasing a boost leak issue since i bought the truck 5 months ago.
 
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