Nissan Clipper rough running

Sounds like a coil pack issue. I had similar symptoms with my Clipper: rough running and stalling. Have you checked the spark plug connections to the coils? Misfires can cause those symptoms.

Spark plug connections look ok visually. How did you diagnose yours further?

I chased the same gremlins. Ended up being a faulty ignition coil due to a dodgy plug connector. Given the mileage and symptoms, a workshop visit might be best to properly diagnose the misfire and confirm the coil. Don't want to start throwing parts at it.

The workshop confirmed it was a defective ignition coil and a faulty connector. Repair cost 95€. Runs great now!