wjamyers

Sorry to cross post, but I think EcuFlash and Dyno graph forum readers maybe slightly different crowds, so:

Initially the thought was my COP was not functioning correctly, I went to Matt at SpoolinUp and he hooked me up with brand news coils, unfortunately the problem didn't go away.

Additionally, I've seen my knock sensor flash (TephraMod) at Partially open throttle in 4th gear for no reason I can think of.

I'm a little worried.

Any ideas?

W_Myers_2006_Evo_IX_DynoGraph by wjamyers, on Flickr

wreckleford

iTrader: (2)

Post a log and pics of your maps. Where both runs done on the same day? There's a big difference in the mid range of the two curves also.

wjamyers

can't do maps but will do logs.

forgot to mention using Tephra dual maps, those are two tunes, max power for fun on the street and super conservative for the track.

the fact that it's happening with the conservative tune indicates it's not a knock issue.

georg1970

Since your boost and delivered lambda curves look stable the only one thing left to check is ignition timing. If that is OK too- than it is a mechanical issue providing you are not running out of your fuel flow because of injectors or fuel pump limits - I have seen it happening quite often.