gsuburban
Junior Member
- Joined
- Mar 12, 2022
- Posts
- 18
- Reaction score
- 13
- Location
- L.A.
- First Name
- G
- Truck Year
- 1989
- Truck Model
- V1500
- Engine Size
- 5.7
That quadrajet also needs to confirm the float position with the carb kit measuring tool. A low float can make it lean as well. The idle mixture screws have nothing to do with above idle mixtures which means the metering rods need to be checked for proper flow. Also, the secondaries have an upper butterfly that controls how soon the added air feeds into the secondary throttle plates which those dump tubes feed. Its difficult to see when those butterflies open under load however, if there is a need to adjust them to open sooner or later, there is a tiny allen screw under the choke pull down linkage on the right side of the butterfly rod. If the idle is good, 650 to 700, RPM you won't need to do anything with the initial base idle screw which is hidden on unaltered carbs. There are many adjustments and many tiny air bleeds that have to be free and clear of dirt for it to function.