No warning lights. New everything: 1999 Astro 230K Fuel pressure ok. Nobody can figure it out why it runs so bad. Starts and idles ok, then as it warms it acts like it's running on water mixed in the fuel. Cuts in and out.  Not sure it's losing spark?? Good coil, all kinds of new sensors, new plugs,...

1999 Astro white cargo van with the v-6 Been having trouble for ever,maybe 3 months. Can't drive it now as it really runs bad after it warms up. Not over heating. It starts sometimes real fast then other times it takes for ever, turning over and over and over then kicking in. The motor runs good unt...