jsenclosure

I've been throwing a few codes lately and getting a CEL. Quick search brings up misfire codes i believe. The car runs perfectly fine and is unnoticable but i am wondering if anyone else on here has had the same issue and where to start. I can clear the codes, drive for a week with nothing and then they come back. My first throughts are plugs. car is a 00 with 119kmi. Any thoughts?

Codes:
P0300
P0301
P0303
P0304

Thank you

114_ap2

have you changed your spark plugs yet or done a valve adjustment?

jsenclosure

nope that is on my list of things to replace. Anything else i should be checking?

Reckon

I'd start with what you have listed. Go through a fill tuneup and get things fresh and see if that takes care of anything. Are you the original owner or know what the maintenance has been?

jsenclosure

i have no idea the maintence on this car, i got it in november 5kmi ago

VAD

S2000s do not have distributors or ignition wires. I'll bet the plugs are original. Start there.

jsenclosure

will do

importkid

Being an 01 with a good amount of miles on it and you just getting the car you should replace plugs and look up how to check valve retainers when checking the valve clearance. they are prone to cracking and will eventually drop causing a list of problems. Do you have a miss at idle?

jsenclosure

Just an update, i replaced the spark plugs just over a month ago and haven't had a since code return yet, they were not the oem plugs either, just some cheap ones. I replaced them with the oem plugs. problem solved

s2000maniac

adjust those valves before they burnout!!