Replace Fuel Injector - Cost - Is it worth to repair

Thanks for your advice. I will try one of those cleaners.

It is a 2006 V6 Maxima GXE. The looses power at around 40mph and the right front wheel shakes/looses grip. Sometime see this problem at less than 40mph too. I take the foot of the pedal when this happen and it goes away. Never noticed this above 40mph.