Mobile Ad Hoc Networks (MANETs) have a crucial role in facilitating adaptable, infrastructure-less communication, emphasizing the importance of ensuring their efficient operation in dynamic environments. Nevertheless, proper configuration required for optimal data transmission. The functionality of these networks is often compromised by suboptimal configurations of default routing protocols, leading to challenges associated with Packet Delivery Ratio (PDR), throughput, and delay during route discovery and route maintenance process. This study aims to address this issue by examining the impact of adjusting routing protocol parameters on network performances. Through the utilization of the OMNeT++ simulator with INET4.2 modules, a comprehensive analysis of the Destination-Sequenced Distance-Vector Routing Protocols (DSDV) and Dynamic MANET On-demand (DYMO) protocols was conducted. In the case of DSDV, optimal modifications to parameters such as helloInterval, routeLifetime, and maxVariance resulted in significant performances enhancements, with helloInterval set at 0.5 achieving the highest PDR of 94.43%. Regarding DYMO, critical parameters like maxJitter, RREQHolddown_Time, and maxHopLimit played a key role, with yielding the highest PDR values of 95.25% respectively. The variation in pause times also had an impact on network performances, as specific parameters exhibited notable enhancements in PDR at various pause durations. These discoveries contribute to the progress of more effective routing protocols, thereby enhancing the overall service quality in MANETs.