Yep, I'm officially claiming myself in the P0300 group. Did more research and found other people noting the same problem such as:

"It popped on this morning on my way to work, in 5th gear, 80% throttle, 80~mph or so. I felt the car emitting a mild vibration in the pedal and when I looked down the SES light was right there staring at me. I swung by the dealership on my lunch break and confirmed that it was in fact my 3rd occurrence of the P0300."

The bigger problem is there is no sure-fire fix. I don't feel like visiting my dealship once a week just to get reflashes that don't seem to work very often. Plus, it would be overwriting my P2... then you have to start overnighting to California to get it back and damn...

I'm not blaming the P2 or Works - blaming Mitsu.

 

Isn't WORKS already shipping the P2 code that has the P0300 fix integrated?

-S ...

 

WORKS is doing the P2 integration for our customer who have the P0300. If they aren't experiencing the P0300, there is no need for an integration. The protocol is to have the dealership reflash the ECU for their P0300 fix (which does overwrite the P2 software). Then WORKS will integrate the two (for free) if you stop by or mail in your ECU. Just be aware that your boost will not be controlled by the ECU after the dealer reflashes it and you'll want to take it easy on the throttle until the P2 is loaded back on.

 

There is no dealer reflash that has proven it will fix the problem. I've read many threads where people have been flashed multiple times and still getting the P0300 or a variant of it. Therefore, why would we wanna go through that mess at the dealership - then pay for overnight shipping both ways to get our P2 back in, all the while having our car inoperable? If the dealer flash was proven to fix the problem, that would be different.
WORKS doesn't have a fix for us directly?

Whoa, this sounds dangerous. Is there potential of unlimited boost then because we don't have the pill anymore?? What is deemed 'easy' on the throttle?

 

The dealer reflash overwrites the ECU's ability to control boost as dictated by the P2 software. Staying out of boost would be ideal under this condition, but as long as you are monitoring boost and keeping it below 20, you should be OK.

We have seen the dealer P0300 update eliminate a number of our customer's problems and that is why we recommend it.

 

Maybe the CA dealers are smarter than most then, I've read nothing but bad news on this. While some have helped, a majority get the SES light back on the drive home even! If we know when we get the SES light (5th gear @ 80) could we just avoid that speed on the drive home to not throw another SES light and let you guys take it from there?? That doesn't sound all that scientific, but thought I'd ask.

 

Got this from another thread in main forums:
See why some of us don't want to waste our time with the dealers?? Not when we have to take off work and it's 25 miles out of our way!

 

^ I'd say since the rest of us know there is a factory fix that would make that dealer a flat out liar, take the car somewhere else.....

 

What RT said ...

Just remember that alot of Mitsubishi dealers suck *****. I want to think of a better way to put it, but that's just the fact. They arn't used to dealing with a car on the level of the Evo, and many don't know what they're doing.

There definitely is a P0300 reflash, that's not just "Resetting the ECU."

It's most dealer's ignorance that made me decide that no one except San Rafael Mitsubishi or WORKS will ever touch my car.

-S ...

 

http://www.norcalevo.net/gallery/alb...um35/boost.mpg

Back to the subject of the post, above is a short (but large) mpeg1 video of my defi-link gauge playing back a WOT 'event' in gears 2, 3, 4, and briefly 5. You can clearly see the boost spike and then fall back. I don't remember where I shifted but it was probably around 6k.
Gear 2 it jumps to 21, drops to 18, and then settles at 19.
Gear 3 it jumps to 24 then settles at ~20.
Gear 4 it jumps to 25 then settles at 21.

Works - what would it take to have the boost peak and hold steady without the overshoot?

engine mods at the time of this vid were:
- P2 flashed 2004/11/5
- Works 76mm ceramic DP, 76mm resonated IP, AB, and aperture
- UR test pipe

 

Wow, that looks dangerous!

 

My boost behaves similarly. I'd also like to know if this is how the boost is supposed to behave w/ the P2 and if it's safe.

 

Mine behaves the same. I get a dramatic spike in boost in 3rd and 4th gear.

 

Thinking about purchasing the P2, can we get a answer to this. Just want to know how safe this spike is? Thanks.

 

correct me if I'm wrong, but I vaguely remember that the boost spike is a characteristic of the P2 flash. (almost like the P2's "signature".) I dont believe that its caused anyone any problems so far...