Well, at least we've got it narrowed down to either a fuel or electrical problem.
Fuel pressure shouldn't be that hard to check, but given the number of connections in engine harnesses and the engine bay in general, I still wouldn't discount the possibility of a ground connection that didn't get tightened properly during the rebuild/reinstall process. (For example, what about the other ends of the (+) and (-) battery cables?) 5000 miles is enough time for something that wasn't tightened properly to have vibrated loose just enough to start causing intermittent problems like this.
Reply With Quote