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Time domain methods for transient analysis of pulse excited interconnection structures are of big interest. Since frequency domain methods with IFT in a frequency range given by UWB pulses need much computation time, in particular, if system investigated have a low dissipation and the response time is relatively long in comparison with the exciting pulse. A further advantage of time domain methods is the opportunity for including non-linearities. Unfortunately, numerical time domain methods sometimes meet the problem of late time instability. This disadvantage holds also for the standard PEEC method and for MoM (MOT). The present paper provides a contribution for avoiding such instabilities. A modified full-wave PEEC method for obtaining stable time domain solutions is developed and tested.