Backfire at WOT, WTF?????

[gsturbo91]

Ok guys,
My Eclipse has started backfiring a full boost and WOT in 1st ans 2nd gear. What could it be, I never heard it before the new exhaust, could that be it? Please help!!!

 

[gsturbo91]

Oh and it doesn't do it except for high RPM's in first and second.

 

[cait sith]

Say hello to FUEL CUT!

 

[gsturbo91]

How is that fuel cut, my air-fuel guage is in the rich zone and im not even near the rev limiter?