ok i have a 86 350 form a truck with a 4 bbl rochester q-jet and well i when i stomp on it it doesn't kick down like it use to. no more thorw in back fo seat it a nice good pick up but it's lagging and when the secodnays open in just boggs and really don't recover so i'm lost

 

Take out the secondary rod hanger that's held in place by a single screw between the secondary air valves on top of the carb. I'll bet one or both of the rods has fallen out of the hanger and is laying down in the jet. If so, you can fish the rod out with a small pair of needle-nose pliers and reinstall them in the hanger.

But if it fell out once, it'll probably do it again. A replacement hanger with holes that aren't worn out larger is the real fix if this is your problem.

 

i can't get that screw off it's to small of a tq size i don't have the right set so i looked down i could see the rods they were attached to the top i dunno aout the bottom though and when i was i was out their i put it to wot while off to see if the bottom secondary opend which they should cause they did when i took the carb off.. unless thats not spouse to sorry kinda new to this i am very lost

 

When the engine is off and cool, the choke will lock out the secondary throttle blades (the ones on the bottom).

With the engine off, push down with a finger on the secondary air valves (the ones on the top). Watch the rods & hanger - do they move up as the AV opens? If not, the plastic cam has broken.

With the engine running and air cleaner off, push on the AV with your finger - did they open? If so, your choke pull-off is shot.

 

i pushed down when car was running and they didn't open and if they were gonna it would take a lil bit of force so waht does that mean? the rod and hanger goes up and down when i move the av so those are fine???? but thanks for the help just eleminating one thing at a time

 

AV opening is controlled by 2 things: The choke pull-off, which keeps them from "jerking" open, and the tension spring, which controls the rate and timing of opening (the pull-off will also affect rate).

Had to eliminate the pull-off, since this seems to be something that came on rather suddenly, rather than a mis-adjustment problem.

Since it doesn't recover, it does sound like a fuel problem, either too much or not enough. What Damon was chasing was too much. Do you get black exhaust while it is bogging out?

 

i dont' know haven't tryed having somone look behind me while it does that but i'll try and leave one if it is. i could just be running out of gas but i just filled up i dunno

 

yeah ok no it does not have black smoke and my idle slowly will start to rise to about 1250 and my choke light never comes on any more so i'm lost on whats worng porbally something with my choke??