My blazer idles rough and dies when I give it gas. Please help.

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I've change everything I can think of on this blazer and it still won't run. It barely idles and bogs really bad when I put gas to it. All sensors have been changed. Cap, plugs, wires have been changed. All plugs are now fouled after trying to start it. No codes come up, and check engine light does not come on. All fluid have been changed as well.