Can the timing be set on a 1996 Nissan 4x4 with 4 cylinder engine or is it electronic?

The 1996 Nissan 4x4 with a 4-cylinder engine likely has electronic ignition timing. While it *might* have a distributor, the timing is controlled by the engine control unit (ECU) and not manually adjustable via a distributor. You cannot set the timing in the traditional sense of rotating a distributor.

Any attempt to adjust the timing directly would be futile and could damage the engine. If you're experiencing timing-related issues (like poor performance or misfires), you need to diagnose the problem using diagnostic tools and potentially repair or replace components within the ignition system or the ECU itself. A mechanic with experience in OBD-II diagnostics will be necessary.