Does the fuel pump (not the injection nor the manual priming pump) die a slow death i.e. intermittent failure to work properly ranging from working fine for a while to causing rough idling/ rough running/loss of power/ to stalling out? Or is it either all good or sudden complete death - supplies no fuel at all ever again?

Or what symptoms did you experience which were cured by replacing/rebuilding the pump?

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'83 SD, 2x '85 SD
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