that was one of my concerns I brought up earlier in the post. I guess I can run for a day every now and again with the Creader unplugged just to see if it throws anything other than the 0300. It seems as long as I stay out of the boost it will not throw w/ it being unplugged, but with it in it is sickness. Wooohooo thanks again Shiv, I am not angry anymore j/k I was never angry just concerned

 

What kind of theory is that??? Spark getting blown by boost? Are you okay today IE??

It’s the xede causing the code to come up and that’s all to it. I had no P0300 until I got the xede on my 03


Now does that code harm your car? The answer is no. Does that code harm performance? The answer is no.

 

Actually, the answer would be yes on the performance. Maybe not the code itself, but it is definitely misfiring like a **** when the code is there and the light is on. As far as harm, I am not sure. I plugged the Creader in after it did it the third time, and it has not done it again. It is pretty much a negative that it is the XEDE in general; however, I do believe the others are right about the SMART being the cause. Shiv updated my XEDE before he began tuning my car, and it started having problems after a few hours of driving. The funny thing is it did it under moderate boost about an hour or so after I had been going 140+ w/ some bikes( on a closed circuit of course ) Either way the Creader seems to fix the problem just fine.

 

oh so its really misfiring on yours? on mine I had the code but never felt the misfire which as you know pretty easy to feel.

If it is a real misfire then yes it can easily harm your engine.

 

Not true... You will still get an SES light with other errors. I know this from experience.

 

Welcome to reality Az3ar, you don't know everything. Yes, spark CAN be blown out in high boost situations.

I agree that the Xede's SMART can cause the PO300, but high boost can also be a cause.

And a PO300 on a SMART Xede car that doesn't have a creader will most certainly hinder performance.

- Steve

 

It will cycle 4 times and go away. On a bright day for example, you might not see the SES, and the ECU was telling you your wankeled rotary blade needs adjustment....

It doesn't necessarily improve your "margin of safety".

 

You can avoid the P0300 issue with a SMART-equipped car by simply changing a couple of rows in the SMART timing table. Just eliminate the positive timing offsets and put zeros in their place. The only downside is that you will lose some of the drivability and off-boost torque benefits of the SMART system. Most people don't want to do this so that's why the CReader makes sense. And like Superhatch said, it doesn't eliminate all codes from popping up. Just P0300.

And yes, more boost/power can and will make misfire more of an issue. The higher cylinder pressure in the combustion chamber makes it harder for the spark to bridge the gap. Hence, the idea of smaller gaps.

-shiv

 

While I understand what you mean, if you miss a SES light for 4 cycles, shame on you, not the creader. I check my idiot lights every time I start the car, which is why I caught it the very first time.

 

hmmmm, no one said I know everything. Did I say that?

So you are saying that spark can be blown by pressurized air? hmmmm can you explain that to me instead of being smart *** for example?

Oh and there is no reason to get hyped. We are having a civil conversation here can you handle that?

 

never mind, Shiv explained it.

superhatch you are almost there just work on your communication skills

 

Isn't that what IE said?

 

Az3ar, I've been reading you give people bad advice for the last... I don't know, forever... just stop already.

 

Wow, no need to get hostile anyone. Thanks for chiming in Shiv. Fortunately a few other people that had been through it gave me some advice, while I am sure you were catching up on some much deserved sleep. I only felt it misfire the first time it happened, but it was some insane stuff. Not just a putt putt here and there it was drastic. I just put the blinker on and moved over to the side. It was all I could do to keep up with the flow of traffic to make it to a gas station off the interstate. All seems well, but I think it a good idea to inform newly tuned owners of this possibility before they find out and get freaked out i.e. me. Ha anyway the car is great, thanks Shiv

 

His theory is correct. Our stock ignition is crap to start with. It is a waste spark system with one coil for two plugs on a car boosting 20.5 psi stock. Increase the boost by 1-2 psi and you get a blown spark. It usually happens at peak boost/peak torque when the spark has the hardest time to jump.

I suspect that it happens in almost all modded EVOs running stock iginition. Your car will run perfect, but you are still getting a blown spark. My car is like that, but I log my AFR daily and on occasion I get AFR spikes of +22 indicating a blown spark. Basically the mixture is expelled from the cylinder w/o a perfect burn and it has a lot of O2 in it and the sensor picks it up.

I talked to Klaus Almeddinger, the head engineer at Innovate and he explained what I just said. He told me that this is only an issue if you want to extract the last smidgen of power from your car under racing conditions. Before I start tracking my car, I am buying either the Bucshur COP or the Switzer COP system. They are expensive, but well worth it IMO.