This just started tonight. I didn't change anything. I got two runs in before it happend. The first was OK and the 2nd was still good and the ET was decent considering track conditions. The 3rd & 4th runs started the surging. Same exact time and same exact surging. The graphs overlap identically. It was before the shift at around 7100 RPMs. Any ideas? First stage on right at the hit and the 2nd is on a progressive starting at .9 and is all in by 1.7. Right after that at around 1.85 the surging starts. Timing is OK, Digital 7 program tree is OK, crank trigger pick up checks out ok, distributor cap and rotor are ok. Not sure if some gremlins got into my computer or digital 7 or my Edelbrock progressive or what. Photobucket won't upload it because it is not a JPG.