im running 23psi with buschur 20g and all bolt ons basically..man just this winter my car started running like crap and seem like everything starting to fall apart..i need to take some time out and really look into all the problems..

 

Honestly I've had the best results with lowering the entire portion of numbers that shows positive advancement. The main portion that reads all 0's is fine to leave alone, that just means there's no extra advancement over the high octane timing map. Just lower all the numbers that are above 0 in that little cluster by 2-3 degrees depending on how bad the code occurrence is. If necessary, take the timing down even more, but be warned that you will start to lose bottom end power if you decrease by too much, mostly during a cruise/low load situation.

Essentially with larger camshaft intake durations you're extending the amount of recirculated exhaust gas being drawn into the combustion chambers, so by decreasing the extra timing advance added in through this map it helps to combat the "misfire" the ecu tends to pick up on.

As of yet I haven't seen a map listed for an "EGR duration" that you could specify the amount of exhaust gas being recirculated. It would be nice though for those who'd like to keep their cars smog legal and code free, basically the larger the cam you install, the lower the amount of time duration for EGR lol.

 

There are so many parameters to the p0300 check that could cause it that it makes life difficult when trying to track down the exact cause. Anything from a bad tank of gas to excessive knock or a bad or loose crank sensor can trigger this code, although generally I noticed p0300 more during the winter than warmer months. If you've installed cams recently and noticed it more due to them, you should look into either the p0300 disable or reducing the timing added in the EGR advance map like I posted above. Otherwise it could be anything...even the maf sensor hitting off something can cause it. I'd start with the basics and work up to the more complicated things though (as most times it ends up being something rather simple), checking your plugs/heat range/gap and going from there.

 

i do notice car misfires when at idle cold but i hope its nothing too serious that caused the code..this is second time this month the p0300 was trigger and both time was at cold temperature

 

More than likely it's nothing serious. 99% of the time it's just the ecu's stupidity, so I'd say give my little fix a try and see if it works, or do the disable. Mine used to pop a p0300 about 2x a day after installing my cams.