ok, I'd have to dig deeper to separate out the P0300 from the P030X codes. Not sure when I'll be able to get to that.

 

MrFred, correct, the p0300 itself is the problem not the individual cylinder codes.

 

ok, just so you all know, the evo 8/9 folks disable all the p030x codes. not too hard too feel a real misfire.

 

I've had a real misfire before, too low of timing on e85. I know exactly how it feels, its pretty violent at least mine was lol.

So yea I hear ya on that, but still it could help spot something not in WOT that makes you check a bad sparkplug early or something.

 

+1

 

Interesting!!! I get the misfire code every once in a while too is kinda annoying.

 

I found these the day that MrFred posted... I guess should have posted then.

For 5557, 8 and 9:
<table name="DTC P0300 Disable/Enable (0/1)" category="Misc" address="503b5" type="1D" level="1" scaling="uint8"/>

 

I have never seen a Mitsu computer EVER throw a misfire code for an actual misfire. Second gens and on have always been phantom.

Aaron

 

Nice work sir! Thank you for the hard work!

 

What are the cause of the code being thrown then?

 

my 2 cents..

dont disable

 

Yah in a little hesitant to disable just because I dent want All the codes turned off, just the p0300 only.

 

Just to be clear, it only disables P300, P0301, P0302, P0303, P0304. I'm still puzzled why you guys are worried about the P030X codes. A consistent misfire is easy to detect by seat of the pants. Heck, even a random misfire can typically be detected in a datalog. An example of something I wouldn't disable would be a crank sensor or cam sensor code.

 

Mine did. I wouldn't have know there was a problem either had it not been for the code. The car seemed to be running fine, threw the code so I pulled the spark plugs and found one of them to be damaged.

 

Honestly that is an oddity. They have thrown them for clutches, cams, valvesprings, dogs barking, etc. but I have never seen the P0300 for a misfire. In the 1G and 2G it will do it on a 6 bolt swap when you switch the cam sensors. Like Mychailo said, you can feel the hickup from a misfire, see it in a log or dynosheet (100whp drop sometimes), and never actually throw the code.