i have a q-jet 4bbl it sits on top of my 350 -88 no goodies
just a plain one (i think the carb is older)
i have rebuilt the thing 4 times and still
my el camino will hesitate when i "put the pedal to the metal" waht to adjust the needlels,vaccum opened secondaries or buy a new one but that is
no fun i want to fix the problem myself
/mike

I would start with making sure the secondary air valve is adjusted properly. The valve is controlled by a small spring under the air horn, on the passenger side of the carb.

It is a very common “speed trick” to loosen the secondary windup spring so that the secondaries will open very quickly. This is the single most common cause of a stumble or hesitation.

The secondary valve spring preset is adjusted with a small, slotted-head screw on the passenger side of the carb, right at the top of the carb on the secondary side. The screw head points right out to the side. 90 degrees from this, on the bottom, there is an allen-head lock screw that keeps the slotted screw from turning. If you have trouble seeing it, place a mirror under the area until you spot it. Sometimes it is easier to remove the carb to get to this screw.

With a small slotted screwdriver holding the adjustment screw, loosen the allen screw about ¼ turn. This will allow you to turn the slotted adjustment screw. Counting the turns, allow the slotted screw to slowly unwind until all spring tension is gone. You can use your mirror to see the spring disengage contact from the pin lever underneath the air horn. If the spring tension was lost after only ½ turn, the windup was too loose. Bring the spring into contact with the lever. Note when it just barely touches. From this point, wind the spring up between 3/4 - 7/8 of a turn. Hold the slotted screw at that point and then tighten the allen head lock screw. This is a good starting point, and will prevent any bogs or hesitations due to premature secondary opening.

graemlins/thumbsup.gif

yep that did it
:D thnks/mike

that should be thanks