I ran my dads car last Friday and it went a 7.43 to the eighth w/ a 1.57. I was hoping to see a 11.50 pass or possibly a high 11.40 but at the 1,000 ft. the boost droped 4psi and the o2's went from 800 to 720's and I lifted, could it be a loose vaccum line?BTW I did not show any knock retard.