1989 Ford 460 E 350 not running, need help
1989 Class-C 25-foot Ford E350 RV gasser with 79K miles (first-year fuel injection). Question: Upon start-up while preparing for a trip in Feb. 2022 there was a loud noise like something broke, clatt...
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I would investigate the catalytic converter further. It sounds similar to an issue I had with my truck. It ran fine with good power most of the time, and intermittently the power would drop right down. It turns out that one of the catalyst "pucks" in the converter had broken in half, and the halves would rattle around in there until one of them became lodged sideways in the outlet of the converter, causing a severe restriction. It would break itself free after a bit, and power would be restored. Not sure you would be able to locate this blockage with a pressure test as it is intermittent. I cut my converter in half and knocked the guts out and welded it back up. Been fine since.
