My motor is bogging in first and second gear but runs really smooth in 3rd, 4th, 5th. Actually we think the motor doesn't have as much power as it should on acceleration. Im going to replace the plugs, rotor, cap and check the timing tonight. I was wondering what degree should the timing be if im running on average 91 octane. Is this advance or retard? (im new to timing) Is there anything else you guys think it could be.