!! Cyclic variation of engine torque

[ttyy3]

If the cylinders fire sequentially according to the fire order 1-2-4-3

What is the pattern of the cyclic variation of each cyclinder engine torque and the resultant engine torque?

[Mark44]

What are your thoughts on this? Given that you are new to this forum, you might not have read the rules, which require you to show some effort at solving your problem. Show us what you think and we'll go from there.