Hi techs, 99 Astro 4.3 17k on clock. Idles ok, no skip under power, but has a lack of power, FEELS like no fuel or clogged exh. Diognosis so far. Fuel prs running,60 , 20 inchs vacume at ildle and goes to 21 at 2000rpm. Fuel filter not clogged. Here comes the ... Login to read more.