I have known this to work on 3 other evo's i have worked on. at less than $2 a plug, i dont see the harm in trying. make sure they are gapped to about .26-.28

 

does the Creader learn when the code comes up and then clears it?

 

The CReader reads the codes on the system and displays them. I believe it displays any prior, uncleared codes as well up to the past 2-3 (?). It then automatically clears all codes present in the system.

If you have one installed, it will display and clear without you touching it. Therefore, if you have it installed while driving and don't notice the Service Engine Soon light or the CReader's display when a code hits, it will get cleared without you being the wiser. This means that, even if it's a code OTHER than the 0300, it will be cleared and you won't know it happened.

Also, if you have other symptoms when an 0300 (or any other code for that matter) crops up, they will be present at least until the code is cleared. So that "stumble" will still happen, but go away when the CReader clears the 0300 a few seconds later. It is NOT immediate.

Hope this helps.

 

I first got the P0300 code 2.5 years ago. When the reflash didn't work I started searching this site for a possible fix. From here I found a vendor site with a product write-up in which the vendor explained that the customer would also need to obtain a Creader because the product they were offering would cause a code. They explained that the Creader would actually prevent the code from being set if kept in the port. I got the impression that they weren't completely sure why this was. It was sort of a discovery.

I tried briefly today to relocate the site and the write-up but no luck.

It is possible that my car has just stopped setting the P0300 code since I plugged in the Creader. Otherwise it has to be the Creader that is preventing the code from being set - and I don't mean set for a few seconds and then going away. When the code is set the stumble is very noticable.

 

thanks, I think this is my next attempt to fix or correct the problem!

 

...new engine fixed my P0300 issue...

 

$2 a plug. aren't u suppose to use iridium plugs? i think we are talking about the same plugs. ie. the spark plugs

 

I have the same issue, and the first mod I did when I bought my Evo was disconnect the clutch switch due to the DSM days of crankwalk. Have you talked to the guys at York Mitsu about this reflash. I have been wanting to call Mike and talk to him, but procrastination has been on my side lately.

Fred

 

I have a 2006 evo 9 it has 13 K on it and it just threw the p0300 code... What should I do? Change the plugs, or go to the dealer and see if there is a reflash?

 

If you have warranty, run to the dealer.

 

I'd take it to the dealer, 03's and some 04's were plauged with the problem, they fixed it for 2005, the dealer should be able to tell you what's up!

 

I have a 05 and get the p0300 every once in awhile. I think it must be my clutch.

 

Shouldnt you just be able to upload your map/tune to another persons map that has had the p0300 dealer reflash? The software should be the same. Anybody out there want to shoot me there rom file as I sure dont have any warrnety left...haha

 

the p0300 is a misfire code... there's talk of the knock sensor being too sensitive or something... the only way to fix that route of thinking is to go stand alone.

otherwise some tunes have been known to generate the p0300. this would lead me to think it's something that could potentially be tuned out. if that's the case then there's hope.

 

I understood this was a "firmware" mod in the ECU that the normal flash doesn't touch. Further, however, I believe tuners COULD get into those settings but, as policy, do not.

This question is for a flash tuner to answer.