the needle jumps like crazy when it bogs at 4500 rpm and up...never havy seen that happen .....change distrubutor still the same could it be the ecu cause i traded a p28 for the p75 the run with my new swap..... any help greatly needed...

 

fixed!!!!!!!!! fcken ground going to the therstats housing added another one and it fixed my whole problem...maybe not enough current going into everything....so always check your ground cause it will drive your bonkers like it did to me.....ftw