The NCEP Global Forecast System (GFS) model has been coupled to the GFDL Modular Ocean Model, version 3 (MOM3) to perform experiments with the impact of ocean coupling on Intraseasonal Prediction. The NCEP coupled Climate Forecast System (CFS) was run in simulation mode with observed Sea Surface Temperature (AMIP SST) and with full coupling. Coupling enhances propagation of precipitation and zonal wind signatures whereas the AMIP mode introduces a spurious response in the zonal wind spectrum. Forecasts were run over active MJO periods with different SST configurations. Again, full coupling enhances propagation and predictability of MJO-like disturbances relative to other specifications of SST. Results will show performance of the NCEP CFS for MJO and ENSO time scales.