[mark_n2]

In reading thru the old posts I found this seems to be a common problem on Roush 427R motors. Mine was built in 07 which is a suspect year. The problem is rolling onto the throttle results in a spitting, coughing, etc. The lower the RPM and the higher the gear the worse the problem which makes crusing in 5th a real pain. It clears up quickly in all cases and when it does...... I read about the red, blue, Green dots. Can someone provide some history and where to find these dots on the carb.