I have a Dodge Charger R/T 5.7 Hemi. I played with the part throttle and minimum spark tables to get the Exhaust Burble on Deceleration using negative timing. When I'm in park it sounds great but when I'm driving I can't hear it and the rear end does this jerking thing around 1100-1500 rpm during deceleration. Any ideas on a fix or a correct table for timing?? I think I attached my tune file so you can take a look at it but any suggestions Im open to.