diesel clatter

Hey group, I've searched about clatter, injectors and additives. But my question is regarding additive usage.

1987 300D Turbo - I have located the source of my clatter to the injector closest to the firewall. I don't have time to try a can of Diesel Purge the way it is intended.

Tell me if this will work: I have to drive 250 miles tomorrow morning. Finally get the opportunity to really warm it up. Can I put a couple or several cans of Diesel Purge in the fuel tank and drive off on my trip without damaging any components? Will it help or hurt? If it helps, is more better than less. I mean should I put in 4 cans instead of two? Or is six better than four?

If it works, I figure this is less expensive than replacing the injector. If it doesn't help, then I'm only out an expensive tank of fuel and maybe five other clean injectors.

Thanks,
--Craig