System is Super Lean ! Any thoughts?

When I turn on my MSP my wideband sometimes chills around ~14.7 then shoots up to 17.0+ ---. The rest of the time it just reads 17.0 or (---)which mean super lean
I have felt all up and down the vacuum block and lines no major vacuum leak
I have new spark plugs ZFR6F-11 at proper gap

I have Jays Racing Fuel Rail, Aeromotive Fuel Pressure Regulator, and a Walbro Fuel 255 Pump, and OEM Fuel Injectors
My fuel pressure regulator chills at 90PSI to 100PSI (MAX LIMIT)
When the engine is running the fuel pressure is on MAX limit.
I remember last year my fuel pressure regulator always read 40PSI weird.

I am thinking my Fuel Injectors are physically dirty? I did use like STP fuel injector cleaner in the tank which was like $6.
 
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