Sputtering Under Boost, Running E85, Not Wires or Plugs

[jm1080]

Hey guys, my car has been running fine with e85, I'm running 26lbs and today when doing a pull, out of no where it started sputtering as if it was something to do with spark. It has been running perfectly, all the settings were the same..I changed wires and plugs and nothing. I never experienced this so it scared me, I just do not want to damage anything. I checked over my engine and everything looks good, idle and cruise is perfect, only when WOT it happens, the boost gauge goes crazy as well (out of whack).

Here is a log of the sputtering:

You must be logged in to view this image or video.

Sputter started 37 seconds into the log doing 3rd gear pull and 107 seconds is another. Car was running perfectly with no changes done, anyone have any idea?

 

[donniekak]

I went through all of that myself. Plugs, wires, plugs gapped to .018", tuned leaner, nothing. I then shmmed my wastegate, checked the turbo, nothing. My bov was blowing open. It only happened above 23 psi. This was on e85 also.

 

[jm1080]

Hmm, your BOV was blowing open above 23psi? Isn't it supposed to open? Like it sputters and backfires, doesn't seem to be anything with BOV as it was running perfectly before, but will check tomorrow. This just caught me way off gaurd, everything was perfect and out of no where it just happens