Paul E Walnutz

my truck did the same thing at 48-50 miles per hr, it turned out to be the coils. do a coil test and find out which one or ones are bad

redfishtd

Get torque pro $5 / bluetooth reader/ android old phone look under test results to see which cyl acting up.It will give you all sorts of data cheap . Clean all your connectors with contact cleaner and change any that aren't locking on . Injectors too .. After 100k think about new injectors new not reman .