I rebuilt my Quadrajet to Cliff's specs for my car(Trans-am). I believe the float is set right. Its got a Carter 120gph fuel pump. New jets and rods. New accel. pump, basically all new inside.
When I first started driving it would buck when trying to cruise at light throttle. I turned to APT screw out until that quit.
The problem I am having is with the Secondaries. If I drive along at 30 in first gear it will spin the tires like crazy, but then if I shift into second and get back on it, it bogs. Or if I try to punch it in 2nd or 3rd gear at say 2500rpm it will bog but it sounds like the secondaries are opened, then when it gets up around 4 or 5K it will pull like a freight train. The same happens in 4th at 3000rpm.
Would the spring that controls the butterflies in the air horn need tightened more? Or would it be the choke pull off the lets them open, Cliff gave me a new pull-off in the kit. Any suggestions? It gets very expensive testing this at $4.30/gal for premium. Fun,But expensive.
Luke,
Two possibilities come to mind. Either the secondary air valve is too loose, or your choke pulloff is working too quickly.
The spring that controls the air valve is located on the shaft that holds what looks like choke plates for the secondaries. Get a small allen wrench and loosen the lock down bolt which is upside down. Before you loosen it though, get a small screwdriver to hold the tension adjusting screw which is visible from the passenger side near the secondary air valve shaft. Loosen the lock down screw while holding the tension screw. Loosen the tension screw until the secondary air valve has zero tension on it. Now tighten in 3/4 turn. That should give you a good baseline. Test drive the car. If it still bogs, replace your choke-pulloff.
If neither of the above fixes works, you either have the wrong secondary metering rods, hanger, or a vacuum leak on the secondary side.
Mike
