This problem just started only happens between 35-40mph it's noticable enough to to feel although no backfiring or popping ,all other speeds are fine and revving in nuetral dosn't replicate it.
fuel filter was changed a few thousand miles ago
as were plugs,wires, thermo new air filter, no codes i checked with my Innova scanner
Startup idle goes high when cold and sometimes takes long to come down.
4.0SOHC approx 58,000miles hope i gave enough info to try and diagnose
TIA for any ideas/help. Rob