If coils number 1 and 4 have spark, while coils number 2 and 3 do not have spark on your NP200 1.6 16V, there are a few possible reasons for this issue:

1. Faulty Ignition Coils: The first possibility is that coils number 2 and 3 are faulty and need to be replaced. Ignition coils generate the spark required for combustion, and if they are malfunctioning, they may not produce spark in the cylinders.

2. Ignition Control Module Issue: Another reason could be a faulty ignition control module. The ignition control module is responsible for controlling the distribution of the spark to the ignition coils. If it is malfunctioning, it may not be sending the signal to coils number 2 and 3, causing a lack of spark.

3. Wiring or Connection Problem: It is also possible that there is an issue with the wiring or connection to coils number 2 and 3. A loose or damaged wire or poor connection can disrupt the delivery of power to the ignition coils, resulting in a lack of spark.

4. ECU (Engine Control Unit) Problem: The ECU is the brain of the vehicle's engine management system. If the ECU is not functioning properly, it may not be sending the correct signals to the ignition system, resulting in no spark in certain cylinders.

In order to determine the exact cause, a thorough diagnostic check should be performed. This can involve inspecting the ignition coils, testing the ignition control module, checking the wiring and connections, and also scanning the ECU for any fault codes that may provide additional information about the issue. It is recommended to consult a qualified technician or automotive electrical specialist to diagnose and resolve the problem.