04 silverado

I'm having the same problem on my 04 silverado, but I'm
also running straight exhaust and I can't give mine any gas
without it misfiring like a mother f***** and then dying if I
hold the gas. If I press the gas it just stutters and stalls. I'm
getting the low voltage on my mass air flow and 02
sensors. Brand new stuff all the way around and still having
the same problem. Unplugged my mass air flow and 02
sensors and truck still does same thing. It idles fine. I don't
know how to check for vaccum leaks. A you help would be
great