One thing i have noticed with my Ultragauge is if you let off the pedal, the timing will drop to 14 before. Never goes any higher, i guess it's a emission thing. If you give it just the tiny-est amount of gas pedal, the timing will jump to 30 before or higher, i get a clunk in my truck but it's a stick shift. Now if you are driving very easy, you can get the timing to go about -35, but as soon as you let off the gas, it drops to -14, give it a tiny amount and i get a clunk and -35.