What is the firing order for a 1990 Mazda van?

There's no single answer to the firing order for a 1990 Mazda van. Mazda produced several different van models (like the Bongo, for example, and potentially others depending on the market) in 1990, each with potentially different engines and therefore different firing orders.

To find the correct firing order, you must know the specific engine in your 1990 Mazda van. Look for a sticker under the hood or in the owner's manual. The engine code (often a combination of letters and numbers) will help you find the firing order online through a search engine or repair manual.