Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec ?Help tracking down the stuttering problem....Long...

DemonSVT -- Thanks for the quick low-down on the Apexi unit. With all the info we are discovering so far, it leads me to a hypothetical conjecture -- The reason why some svt's get horrible drivability below IRMC opening with cracked secondaries is that you are allowing more air into the engine via the additional suction from the 2 other valves (via the cracked butterflies). This additional oxygen exacerbates the engine's running on the verge of dangerous lean (fuel economy? Torq?) and causes lean-misfires (too much oxygen, not enough fuel) ie the problems other svt's/v6's have had with cracked secondaries. Let me know what all of you think on that one. That Apexi unit looks like an extremely good avenue to cure this lean-misfire condition in any case or, perhaps, a custom chip that does run the engine so frigging lean below IRMC open (closed loop). Hey WarMonger (anyone really, but warmonger especially), Ill be looking for your additional updates when you post 'em. TtEl.