as far as I can make out, the fault experienced by the OP sounds like it flooded the manifold with fuel vapours and and an improper air ratio, probably by introducing air at the same time.
Imo, if you wanted to get experimental with purge system, you would block any inlet or outlet of air/vacuum to the manifold 1st,
I think that would disable the system from affecting the engine running. It may well throw a code..if you electrically disable the system as well, that may or may not increase the chance of a code
I would be hesitant to "experiment" after all the hassles.
Introducing a new issue would be a real "passion fingers" moment
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'96 4.0 Sport 370k+
'96 Limited 263k (unreg spare)
'96 Sport 335k (got smashed, farmtruck)
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