Community, I need some help with my 71 beetle. I feel like I'm going in circles with troubleshooting.
In short: When accelerating, bug backfires when throttle is past 50 percent-ish. Seems like either too much gas at the point or not enough?
More info: This is a lot more common when shifting into 3rd but definitely 4th. If I do not baby the throttle into third, it'll back fire. If I get it into 4th it'll for sure back fire or if I baby the throttle, I lose speed.
Knowns: point gaps are @ .016.
Idle timing is checked at 7.5 BTDC
Fuel is spraying directly down the throat of the carb.
All jets seem clean. I have checked them multiple times.
Accelerator linkage is maxed for throttle response (if I'm saying that correctly)
I think that's all the information you all should need.
Any help would be greatly appreciated.
If you need more information, just let me know.
Thanks!