01s2k,kobie

thanks man i will do a compression test and tell you whats happening.

GateCrasher

So I've been tackling this issue for about 8 months. I've followed the instructions on page 1, everything was fine, Cleaned the sensors the only component replaced was the coilpacks and I was still having these Codes.

Engine - 40K
AEM CAI + Full Exhaust

I usually gas up around my house and discovered that the Gas stations I frequent use 15% ethanol mixture (Primarily Shell). I had been fueling with this mixture for about a year. I switched to 10% ethanol and within half a tank the CEL cleared itself (Chevron, Exxon/Mobil). I have been filling up with gas that is only <10% and have not had any issues for the last 3 months. I finally cleared the codes from my ECU history last weekend.

If I put <10% ethanol gas = no problem
If I put <15% ethanol gas = CEL after a quarter tank for multiple cylinder engine misfire.
As soon as I fill it with <10% the CEL disappears after 1/2 a tank

That was my experience, you results may vary

madenot

Do you think that i need to replace the injectors?
[media]http://www.youtube.com/watch?v=y7GxT5y2Sog [/media]

mrhands0me

+1 to the list of people with misfire codes.

3 weeks ago I got the P1399 code - multiple misfires.

-Changed the spark plugs ... ran well for 4 days with very few misfires.
-3rd gear with some gusto and the check engine light came on and I started getting the "shudders" in low RPM. This is really a pain the ass in LA traffic ... I'm just chugging a long with shudders hoping my car is ok/going to take me home.
-I parked her when I got home and just did a compression test.
1 - 220
2 - 200
3 - 200
4 - 195
Seems ... consistent?
- Finished my valve adjustment yesterday ... I did it myself so I hope I didn't make it worst.

Still having the misfires at idle.

*sigh*

sam_spider

^ Injectors.

tntrac

Guys,

Would P0303 code cause a smog check to fail? Going to have a smog check soon. In the strict CA state.

I just swapped the coils from 3 to 2. Its been a few days, light hasn't come back yet.

Opc

in my state, mass, any cel will fail you.. blows

tntrac

I wonder if you use the device (obd2 reader) to remove the light and take the smog check, what would be the result.

mrhands0me

I had my injectors cleaned. They mapped before and after. While 1 injector was reading to do very poorly and were all are now fully functional and running well. When I put them back in ... I'm still getting the misfires. In a last ditch effort I poored in some Lucas Oil to the last tank and I plan on doing a Map Whack. I'm out of ideas and ready to take it to inline four for valve work

blah5

Hi guys,

I havnt posted on here for a while.. I had a MY00 with 96k miles when I traded in the beast I called VeroniKa. Well I had the same missfire issue, so i took it to a friends shop and he said I need a valve adjustment and he didnt have the tools to preform it, and he recommended taking it to Honda to do it. I did and honda calls me saying I need to get a block re done or something horrible that would cost $5k. i told them no and took my car to my friends shop and he said honda never did the work and they were pulling my along. So my friend told me I have a hissing noise which means my tranny was about to break down on me. So I sold the car and now I'm riding in a 2010 GTI. Awesome car hands down, but no s2000. I'm considering selling my gti (as long as I dont take too bad of a loss) and getting another s2000.

Moral of the story, dont give up! The misfire can be resolved! keep updating the forum members and as a group you can solve the problem. I didnt read up on the forum to see if there was a thread going for this very issue. Ek its gonna cost me but hopefully I'll get a MY08 or MY09 in half a year to a year.