It is correct that the computer controls most of the timing on a 94 civic, however it is very necessary to have the base timing set correctly. If the base timing is off, your car will not pass smog, as this is a requirement (found this out today... 2 failed smog checks).
To set the timing you must first find the jumper wires underneath the passenger side of the dash. Usually there is a blue connector. You hook these two wires together, using a paperclip or some conductive material to place the engine into base timing (it factors out the computer completely). From there you use a timing light like you would normally. sensor to #1 plug wire, power to battery. There are timing marks on the crankshaft pully. Point the light at the pulley and pull the trigger, then adjust the distributor to get the timing to specs (my car is 12 + or - 2 degrees btdc).
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