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In the middle of a 4.0 to 5.2 swap in my 94 zj. Got a new fuel pump in and ran the new lines and im getting no fuel at the rail. Just want to confirm the supply line goes to the bigger port on the pump and the return on the smaller. Aside from having those switched and the fpr being clogged i cannot find any reason not to have fuel at the rail. Thanks! ( i did pull the connection after the filter and had pressure and fuel which makes me think fpr is clogged up.)
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