i live in the same building as a kid with a 96 tegra that was doing the same exact thing. i gave the engine bay a once over, his plug wires were all in the right order, i pulled a plug, all nasty lookin...carboned up, not really a big deal, but then i noticed that someone had put in some ac delco plugs. ive always been told to keep the same plugs that the factory puts in. ngk for honda/acura, ac delco for gm, motorcraft i think it is for fords...i gave him a ride to the good ol parts store where we picked up some ngk plugs. an i swear thats all we did and he was good to go...