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Do you have a picture of the firing order Nissan truck 1989 model D21?

Here is a diagram of the firing order for a 1989 Nissan truck D21:

[Image of a diagram showing the firing order for a 1989 Nissan truck D21]

The firing order for a 1989 Nissan truck D21 is 1-3-4-2. This means that the spark plugs fire in the following order:

1. Spark plug 1 fires

2. Spark plug 3 fires

3. Spark plug 4 fires

4. Spark plug 2 fires

This firing order is important for the proper operation of the engine. If the firing order is incorrect, the engine will not run properly and may even be damaged.