No, you can see the fuel-flow pulsing regularly and the EGT follows this. It's all part of the plan.
When I flew the even-more rattly POS Metro 2's that didn't have any electronics on the engine for starting or limiting the EGT, I had to push the 'ENRICH' button myself, and I too would often end up pumping it in a similar manner to what the computer does on the later engines.