This old 1977 351W does not have vacuum ports to do this the way most do it. I say old but it is a freshly reman engine & the carb has been re-built as well. I have started with the idle mixture screws 1 1/2 turns out each. I have read one article that states turn one screw in until it starts running bad, then turn it out until it reaches the highest rpm then turn back 1/4 turn. Do both sides like this.
I have also heard instead of turning out until highest rpm turn out until it starts running bad again & then split the difference.
My attemps have been turn in until it runs bad, turn out until it runs smoother & higher rpm. On mine I keep turning out & nothing changes.
Any help would be greatly appreciated. I haven't messed with a 4bbl since the late 80's
I have also heard instead of turning out until highest rpm turn out until it starts running bad again & then split the difference.
My attemps have been turn in until it runs bad, turn out until it runs smoother & higher rpm. On mine I keep turning out & nothing changes.
Any help would be greatly appreciated. I haven't messed with a 4bbl since the late 80's