2001 QCSB Edge with attitude

seems to only happen when above 6-8 lbs boost
boost will reads about 15lbs high after hitting a large bump on road. it will remain reading high until li let off fuel and boost drops to zero...and it will usually remain fine till another bump on road. A real pain in the **** if your on the fuel, cause then it reads high and cuts the fuel.
I have tried a new map sensor...same dam thing.
have checked some grounds...not super thorough yet
i have also notice occasionally my oil pressure will momentarily drop to zero on the edge(oil level is fine)...so damn fast i dont know if the dash does as well...starting to think this is related...goody

started doing this on trip to London this summer...seems to come and go.

any insight would be greatly appreciated.
no i do not have mechanical gauges at this time