Vehicle is 1991 Skyline GTS_4 A/T. This issue began about 2 months ago and was very random.....now it is predictable for the most part. Was driving home yesterday and Everytime I hit a bump or dip at any speed, the car loses power, then comes back online and continues as normal until the next bump....pulled into a parking lot from a near stop and the car actually stalled out and died. Here is what I have installed chasing this...New splitfire coils and plugs, new OEM ignitor, new OEM MAF, New OEM CAS and also replaced my Walbro fuel pump with a new AEM pump. Nothing has fixed the issue....any ideas or things for my to try?