Do you have a wire that goes to the top of the engine then yes you have a spark plug
Check/replace Rotor Check for spark at plugs
Check the plug and the wire.
You need to check wires. Make sure that you connected plug wires in the correct order. Check that wires are sitting tightly on spark plugs. If it didn't work, remove spark plugs and check the gap for all of them. Install the spark plugs and try to start again. If it didn't work install old spark plugs and try again. If it didn't work check the fuse box under the hood. Hopefully it works.
Check spark plugs and wires
Check your battery and alternator.
check spark plugs and wires
check spark plugs
All plugs are, But you should check them yourself again.
It can be complicacated since on some models the spark plugs are difficult to get to but I would recommend to find the spark plugs first and then double check to make sure you know where they are.
Check the spark plug wires and the distributor cap.
Usually caused by spark plugs not igniting properly. Check that your spark plugs and and your spark plug wires are in tact and working.
If you have no spark on the 1991 Subaru Legacy, you should check the spark plugs and spark plug wires for replacement. You should also check the battery and ignition for replacement.