i have a problem with my trooper that advanced level technicians cant diagnose, my 1990 trooper with 2.8 v6 when driving down the road normal speeds,55 mph my trooper cuts out anywhere from 1500rpm to 3200 rpm and kicks back in whenever i accelerate,every sensor has been replaced,every vacuum line good,good fuel pressure,spark plugs etc.has anyone had these problems? i need help this is my daily driver right now and i need help to fix this problem,any suggestions welcome,
thanks jason