My car ran surprisingly well with my less than 5,000 mile club cam (#3 cam lobe whipped), I just happend to see it while I was replacing the crank (long story but that block is long gone).
I saw this check in another post;
Quick check: Disconnect ECM (orange wire at battery), Remove valve covers, have someone crank the engine while you look for a rocker arm with little or no action. Double-check #3 cylinder, that's the most common culprit. - Jimmy