As stated by Pesuazo, Definately check your ignition system. If the car was running fine, then just all of the sudden wouldn't start, Check for spark at #1 plug by simply removing the spark plug & placing plug (with ignition wire attatched) on top of the valve cover. Have someone crank the car over &
watch for spark at the plug. The spark should be very noticeable. If it doesn't have spark, or has a very dim, weak spark...you know you've got some sort of ign. problem. (ie. bad ign. coil, etc...).
B.T.W.- When dealing with the fuel distibutor- There is a 2"-3" pedestal sticking up just to the left (driver's side) of the fuel distributor. DO NOT try to adjust the hex screw inside this pedestal, unless you are ABSOLUTELY sure of what you are doing...This adjusts the amount of fuel flowing from the fuel distributor & sprayed by the fuel injectors & is a VERY, VERY sensitive adjustment. If out of adjustment, you very likely would not get your car started, until this adjustment is brought back close to where it needs to be...sorry for the lengthy post, hope it helps.