I`m thinking you have a lean condition. HD sets them lean from the factory.
Having added an after market breather and exhaust you have only added to the situation.
A good fuel management flash should take care of the lean condition, hesitation, and cool down the engine temp a degree or two.
I`ll assume plus is lower octane then premium. IMO, the switch was not a good idea. Especially since you are likely running lean\hot already.
Having added an after market breather and exhaust you have only added to the situation.
A good fuel management flash should take care of the lean condition, hesitation, and cool down the engine temp a degree or two.
I`ll assume plus is lower octane then premium. IMO, the switch was not a good idea. Especially since you are likely running lean\hot already.