Turn the idle mixture screw in to lean the mixture, out to richen the mixture.
A slight angle.
how do you adjust the float level on a 650 holly single pumper
It should idle at aprox 650 rpms warmed up.
Any place that has constant vacuum Usually on the back side at the base of the carb.
650-800
Probably the carburetor idle jet is fouled.
Aprox 650 rpm in drive.
With a standard transmission about 600 to 650. With an automatic 800 to 850.
about 650 to 700 RPM.
650-900, depends on what the computer wants after it looks at numerous senors.
idle should be aroung 900 iin park then when in gear should idle around 650 or 700
You can't adjust the idle, it is done electronically. You may have something needed as simple as a tune up or a vacuum leak or it may be more serious such as a burned valve.