Bravada 4.3 cylinders 6.4 and 2 have fire to plug but no Combustions any one ever ran into this? It idles the same with all three plugs pulled!

You are running this with the plug wires disconnected?

I assume you are doing this one at a time?

Just an old trick, here......get some old vac line.....they are loaded with carbon......remove a wire from distributor, and insert a short piece between the wire and distributor...... ground a test light...now touch the other end of the test light to the short piece of vac line...this grounds out the cylinder.....

Well, if you have spark AND compression to the cylinders, and no fire, then you have an injector problem....