Engine hiccup or hesitation only in 4th gear
I'm trying to figure out what would cause my
engine to hiccup or hesitate only in 4th gear approx
60 to 70 mph and only when the throttle is pressed,
doesn't do it when you let off. Every other gear and
idle range is smooth. I have replace the fuel pump,
spark plugs, the tps, cleaned the throttle body and
the maf sensor I'm kinda out of ideas any help
would be greatly appreciated.