Join the club man, P0300 = pain in the ***, you mods needs to ban that code for the ECU or someone needs to hack the damn computer and just pull that code out.

 

Is there a Mitsu tech bulletin for this problem? If there is, could someone please throw up a link?

 

I would like to know also.

These damn P0300 code just won't go away no matter how many sets of spark plugs I've changed....

 

does it cause any performance issues?? i have been driving with my cel on for about 2 weeks now and was wondering if it will cause my car to run any differently. thx.

 

Shiv,
was getting all of the above along with the p0300 misfire code.
finally got to "log-on" to the XEDE...found out that some of the values on Crank, MAF were extremely whacked. some of the values on Crank, for ex., were at -.30(!!) Their graphs had massive spikes going downwards (is my car still ok?).
So anyway, graphs are smooth now (just like you described on your site), and car is smoother.
I got my XEDE/XFlash only recently (March-April). Did it come with this firmware mentioned above? If so, what are common "triggers" for the p0300?
If it didn't come with the firmware upgrade, 1) I'll volunteer, and 2) do current map values hold, even after a p0300?

any special "torque" settings on BOV screws?

Patrick

*congrats on One Lap!

 

I don't understand why you ECU-reflashers don't just eliminate that code from the ECU completely? Just label the flash as "off road use only" if that is the concern. The vast majority of those codes are worthless anyway, most are just for emmisions crap. I want my ECU to notify me if I have a component failure, that's all. I could not care less about emmisions. Can you make a flash for off road use only that would cure this issue?

 

M O T E C......

if only I knew tuning, this would solve my headache. unfortunately, I don't.

thus, I go with the best tuner eventually, he will find a fix

 

Most people see value in the ECU alerting us when there is actual misfiring going on. Eliminate the 0300 code all together, and you will not be alerted....

SC~

 

agreed...
however, if you're like me, you will be very annoyed when let's say, you're cruisin around 70mph, bustin' your hot date's *****, then suddenly - your engine "shudders" (as if one of your front tires went flat), then your SES goes off, and all your b.s. goes out the door, and your game is gone (because now, you're preoccupied with saving face, and your EVO).

Next day, all you here about is "there seems to be nothing wrong, mechanically.....well, your car's ECU is really sensitive...don't worry, Mitsu will come out w/ a flash...errr....." - uhuh, yeah.



*i've accepted my situation...just one of the guys waiting for a p0300 fix

 

You may have a more important problem if your date has *****.

 

I heard that, the 0300 would be the LEAST of my worries if I was going for the good stuff and found 2 nuts.

 

Hi guys,
I spoke to the head of the MMC tech center last week during our One Lap adventure. He noted that they are currently working on a reflash to fix the PO300 problem that some people are getting. He confirmed that there seems to be a resonance in the transmission which invokes misfire detection. As I expected, its because of ever-tightening emissions regulations. Lots of manufacturers are going through the same thing.

Shiv

 

tsk, tsk....apparently, we speak a diff. language...

Shiv, will a test pipe smooth out things? have 30+ miles....p0300 came out only after mods. thanks

 

Shiv, is the resonance from the transmission causing the knock sensor to stop firing the cylinders? What sensor is causing the car to misfire? If it is the knock sensor couldn't someone with an XEDE turn down the sensitivity of the knock sensor using the knock map? I know messing with the knock map probaby isn't the best idea, but it might help the people with a misfire.

 

Are people experiencing a noticeable difference in their engine while they drive when the car misfires. All of the sudden my cars just bogs down. I can still accelerate but then my exhaust becomes really loud. I can't just accept this as a little problem. It's very worrisome and sounds like I'm killing my car. First time it happened to me was on the track. Now it's happening on the streets. 2nd, 3rd, 4th, and 5th gears at different rpms.

I'll check my gaps. I reloaxed my map into the Xede (no real reason, trying anything at this point) and it seems to be doing better. But maybe after the Xede "learns" more it will do the same thing. Who knows.

Great info guys. Thanks.