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Discussion Starter · #1 ·
hey so i got an lly duramax and I recently put the s&b mouth piece at first it made my turbo spool slower and i wasn’t building any boost fast it started to get worst so then i got a new maf for it and it didn’t do anything different i change the mouth piece back to stock and still i was having slow turbo spools like really bad it doesn’t take off like it use to, when i’m stopped i gave it full throttle and still was building boost very slow any know on what i should look at?
 

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I would start by looking for a boost leak.
 

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Discussion Starter · #4 ·
I would start by looking for a boost leak.
when i was driving it around today i was getting fast turbo spools again out of no where i started to build boost faster then i braked and let it sit for like 2 minutes in park i when to start to drive it again and the same thing happened slow turbo spools again
 
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