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Do you have a boost gauge to see what the turbo is doing? What year of truck do you have? A little more back ground into your problem please.
 

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Discussion Starter · #3 ·
2005 1 Ton, don't have boost gauge. 691,000 miles. Had new AC compressor installed just before this happened. Also dryer and screen line. How do you test boost? At what point?
 

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You can plumb a gauge into the intake horn by drilling and tapping it or with a boost bolt that some places carry.

Also try doing a search for manometer test in this powertrain forum to see if it is a test you want to try yourself. That's if you're thinking the blow-by is excessive.
 

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any codes?
low boost will usually produce a code.
key on three times trick

your A/C techs probably knocked a boost side boot or steel hose loose. or they took one off for access and didn't seal properly.

god forbid if they broke your plastic tanks on the 2005 intercooler
big bucks
 
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