In Reply to: Exhaust popping posted by Rusty2n on August 27, 2017 at 14:20:26:
Does the "popping" correspond with engine RPM?
If so, you may have a burnt exhaust valve (could be stuck, but much less likely).
Is the power noticeably down?
Do a compression test. A dry test is adequate to identify valve problems.
If you have a single low cylinder and the "popping" corresponds with engine RPM, look for a burnt exhaust valve.