You could be -1 valve.
Check the cam timing first. If that doesn't look good, then check the compression (after fixing the cam timing). And if you don't have a compression tester or feel like being lazy/practical, just turn the engine over by hand (actually, with a wrench...) and feel for a missing or very weak compression stroke, and look at the distributor rotor position to see what cylinder it is. It should be pretty obvious if a valve is bent.
Otherwise, use a spare plug and check for a spark at each cylinder. Or maybe a fuel injector, connector, or wire just flaked out.
www.clarks-garage.com is your friend with these cars. Just click the garage manual link on the left.