What is the firing order for a 1987 jeep Cherokee?

1987 4.0liter Firing Order Happy to help. Engine model wasn't specified and there are two possibilities for 1987. Here are both: Firing order for 1987 4.0 litre 6 cyl engines: 1 5 3 6 2 4 Firing order for 1987 2.5 litre 4 cyl engines: 1 3 4 2