Gsxtremedsm

iTrader: (15)

ghost, you should feel lucky. I could care less if my engine just put up a code. However I have bad drivablity issues. The car misses/bogs, and I have to let off the gas to get it to stop. This doesn't sound that bad until you have to do it as much as once or twice a minute... (it is horrible)

I will try this other creader as well. Thanks

boostedwrx

iTrader: (27)

Same thing happened to my 03 after I had an Exedy twin plate installed. Never could figure out wtf was throwing the code.

MitsuJoe

iTrader: (133)

I have seen the P0300 on stock cars. There are MANY topics on this one. So far I have seen a two fixes for this.

1. Creader plugged in all of the time. On my personal car I still get it on the highway with it plugged in but then it goes away within a quater mile.

2. ECU+ Silver box. The creator of this device has actually introduced code that has seem to eliiminate the P0300 on EVOs. So far his latest code update has not shown it come back. http://www.ecuplus.com/

Good luck!

Gsxtremedsm

iTrader: (15)

Joe when you get it on the highway, it pops up then the creader automatically clears it? Has/does your car misfire when the code comes up? Do you have to let off the gas, then get back on it? Thanks

MitsuJoe

iTrader: (133)

Yes you have to let off the gas and then get back on it. When it is bad it happens several times a mile. When the creader is in it maybe happens once or twice every 30 miles or so.

When the creader is plugged is should not come on. When it does it is when the creader is in-between clearing the code. Basicly the creader clears the code on every 5 reads. This process is somewhere around 1 minute.

Gsxtremedsm

iTrader: (15)

However it does it automatically?.?. Hmm... On my creader I have to manually clear the code and it doesn't pop up as much, but it is still there.

Ted B

iTrader: (6)

The one I use clears it automatically, and no code or misfire ever reoccurs so long as the unit stays plugged in.

MitsuJoe

iTrader: (133)

Ted,
I have noticed that I still get the misfire on the highway with the Creader plugged in. Once the creader clears it goes away. Although it does still happen for me not as you are advising.

It is still much better than without it plugged in at all.

Ted B

iTrader: (6)

Is the unit you have like the one in the link in post #2, or the one in #24?

MitsuJoe

iTrader: (133)

Post #2. The small direct plug-in unit.

Ted B

iTrader: (6)

That's weird. I have the small unit, and the misfire never reoccurs at all. Who knows?

MitsuJoe

iTrader: (133)

The way I understand it is the car misfires in-between the time it is doing the clear sequence. Like I was saying it clears every 5th time it goes through the sequence.

Typically it will misfire, and within 10-20 seconds the CEl will turn back-off. Like I said my P0300 is some of the worst I have seen. Oh well gotta love the car anyways.

Gsxtremedsm

iTrader: (15)

I would have to put my p0300 up there with the worst. I think if it was much worse than I get I couldn't drive it on the interstate.... It is wierd for me, sometimes if I keep a very steady speed(70-80ish) then it won't do it for a half an hour or so.

Then sometimes in a 60 mile trek on the interstate I have had as much as once or more a minute.
I will try the smaller automatic creader, and if that doesn't help.... I guess I'll live with it until I need an AEM EMS.

Gsxtremedsm

iTrader: (15)

Got one ordered, I will let you guys know what happens when it gets in.

wingless

iTrader: (15)

In many cases, particularly 03' and 04' s the input shaft will wear and create reverberations picked up through the cam angle sensor that causes the ECU to throw this code. Most often triggered at a cruise ~70 mph, decelerating or 5-4 shift

First diagnosed by TRE and eventually proved and added to a TSB in cars that the ECU patch did not work and ignition systems were checked out.