IT CLEANS UP WHEN IT LAUNCHES AT THE TRACK THEN STARTS MISSING RIGHT BEFORE I SHIFT INTO 2ND GEAR CLEANS UP AGAIN THEN MISSES RIGHT BEFORE I SHIFT INTO 3RD GEAR THEN MISSES UNTIL I LET OFF THE GAS AT THE END OF THE 1/4 MILE,I HAVE THE LOW REV SET AT 7500 AND THE HIGH REV SET AT 7500 ON THE 6AL2 BOX,I DONT USE THE LOW REV OPTION AT ALL,IM SHIFTING AT 7000 RPM,CAR RAN 10.55,56&60.