2L TS coil pack testing...how?

2L TS running rough, suspect plugs or coil packs. Is there any way of testing them e.g. -measure resistance, where, how...any help?

Having two sets of coil packs/leads/plugs gives you some redundancy against this sort of problem - unless of course there are several faulty components.

Unplug one of the coil packs see how it runs, then swap and plug just the other one in and run it again. Assuming there isn't a fault with both packs it should run the same both times, unless there are issues with the several plugs and/or leads. Any difference in running, then swap the leads to the other coil pack and try again - problem follows the leads then faulty leads or plugs - problem clears then faulty coil pack so swap the other input lead into coil pack and repeat the last step.