if you are using stock ecm map-- there is an updated program for that problem.
the lightweight flywheel will do exactly what your car is doing aswell.
its the flywheel

 

time for an cylinder leak down on an hot and cold engine you could have valves not sealing or piston rings do this test and save all the guessing games. Misfire is an bad things for an engine ecu sees miss and retards timing to prevent detnation you will cause engine to blow.

 

another things u may check are injector seals that sit in the tgvs they are not reuseable and will cause an lean condition and let a missfire check all four spray so starting fluid in theinjector and if it bog u have an leak.

 

Stop the madness...02's are notorious for throwing what I like to call "phantom cel's". Since day one off the lot my 2002 would throw the exact same cel's. Before I realized it was a "glitch in the programming", I took it to the dealer a couple of times only to have them work on it and find nothing wrong. When they initially saw the codes they told me they may have to do extensive warranty work....lol. Car has always run fine, although it's starting to show it's age at almost 200K miles