LBZ low boost

[tyler.frost92]

Like the title says I'm only making 20 psi of boost with my 07 LBZ. Mods are s&b intake with a new filter, FASS 150 with new filters, pcv reroute, rail plug, 5 inch exhaust and efi live tuning from Idaho Rob. Fuel doesn't seem to be an issue, rail pressure tracks fine and peaks a little over 26k. I've cleaned the maf sensor. Maf reads about 45 g/s at idle and peaks around 450 wot. I've done a boost leak test and everything held great up to 35 psi, no leaks. Vanes cycle normally like they should. I visually inspected the up-pipes, no egr blocker plate in place that could leak. I'm baffled. Can anyone help me out? Thanks


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[Harbin_22]

What are you using to monitor boost? Where are you located?

 

[NC-smokinlmm]

How are you reading it?

 

[Dozerboy]

Is this a new issue that just came up? Or have you made some changes to tuning etc and it has since pope up. How much boost was it making before and how big of tune?

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