how does it idle? if it's a rough idle, you most likely had a vacuum hose pop off. the fact that you're not getting a cel is probably a good thing, meaning it's most likely something simple. take some time, do a little looking around under the hood. things i'd do: check your alternator and battery with a voltmeter, find a compression tester (you can rent one from just about any autoparts store for very cheap), and run that test (ask if you need help); pull each spark plug wire, test that you're getting a spark on all 4 by sticking a screw driver in each one, then resting it just above your valve cover to see if a spark jumps (make sure all 4 are d/c'd when you try this); with the car off, pull the hose off the top of the fuel filter to make sure you still have fuel pressure, then put it back on; finally, i'd check the air filter, but it's probably not that, since no cel. anyway, just look around like that, it's most likely something simple.