Why can't my MPB handle HDV capture anymore?

So i have a early MacBookPro (2,2). 2.33 GHZ core duo, 3GB RAM, 256MB VRAM. And a canon HV30 that i shoot with and use as my HDV/DV capture deck. It used to work fine. I could capture with a few low power processes in the back. But recently, no matter what I do, my processor starts choking and spiking out after a few minutes of capture. Even when i turn off every running process i can think of.

I'm not positive, but i think it began happening around when i upgraded to Snow Leopard.

I know my computer has enough power to handle it, and enough throughput to drives (my drive is on a separate bus than the camera) because it once captured fine.

I've run every gd clean up and diagnostic trick i can throw at it. Even clean-installed my system and it still can't deal. I've also had some other weird processor spikes mostly related to video/photo apps since SL upgrade that i never saw in Leopard.

Anyone else having issues like these? Any ideas anyone? I thought SL was supposed to handle processing better than Leopard It's really hurting my business as i have several clients who work with HDV (even though its a pain in my arse).

Thanks in advance

Maybe the work around is to make another systemk with leopard on in and run FCP and my Pro apps from there