I know that this is not a news flash for some, but I believe that many didn't know that help REALLY exists out there for this issue.
For nearly four years, I have been pestered by a p0300 code which is accompanied by simulataneous shudder/studder and a high knock count. It happens only when I am cruisin' on the freeway between 65 and 80mph in fifth gear. I'd let off the throttle momentarily and the car would be back to normal. But there would be a trouble code.
Back in the day (~2004), I rarely complained but I got 5th gear studder from time to time. I assigned blame variously from that crappy Greddy diverter valve, my Xede from Vishnu, my cams, etc. but nothing fixed it. It didn't happen all that often so I just altered my driving style to be less steady state and ignored it.
Then, I built my motor and got a turbo kit and switched to EcuFlash. The p0300 got even worse. On the freeway, I could almost replicate it at will. I had my little CReader which deleted the code, but it didn't stop the studder. Once again, I altered my driving style and tried to drive around it.
Then, two weeks ago, I discovered a error on my rom 94170008's knock table #1. It had values that were obviously wrong. I reserched here and found that MANY old Evo 8s had this knock table issue and there was fix to the code which I implemented. I was so excited to go out and test drive. Unfortunately, I still got the code!Back to the drawing board. :crap:
Then last week, I decided to switch to an entirely new rom. To my knowledge, the 94170008 has two newer roms that are very similar but offer slight upgrades. I started with the 94170014, but abandoned that effort and went with the newest and supposedly better 94170015. I was very careful to do the switch properly and for the last 3 days days I have been testing it.
Results?? It has completely eliminated the knock, the p0300, and the studder. I cannot replicate it regardless of how hard I try. I recommend any and all folks experiencing this problem to either do this upgrade yourself or have a trusted tuner do it for you. Alfred at Tuning Technologies is available to help with this issue at a very fair price if you would rather not do it yourself.
