2014 Silverado 5.3 with a whipple 10psi long tubes, catless, exhaust etc. Did a pull and everything looked good. Made a couple tweaks to maf, then second pull crazy lean. My high side is dropping like crazy. I've done a few of these and haven't experienced this before at this level. Could it just be a bad pump? I can't get it to hold any pressure now WOT.2014 Silverado 5.3 - Junior supercharger.hptjr silverado.hpl

And i know i'm command pretty rich for this thing at the moment till i figured out the issue.