Random Misfire Occurs During Low RPM & Low Engine Load

WARNING: This page is about a different car, the 2000 Honda Prelude. However, it is still accessible from the selected car via links, so may be relevant.

Check for:

EGR system malfunction. See DTC P0401: EGR INSUFFICIENT FLOW .
Incorrect fuel pressure. See FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article.
Valve adjustment out of specification. See ON-VEHICLE ADJUSTMENTS article.
Crankshaft position sensor malfunction.