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Fuel Systems and Drivability / Re: Reinstalling Quadrajet- getting it to run right
« Last post by Chanman09 on November 29, 2025, 02:31:40 pm »Vacuum ports are all accounted for or plugged, with the exception of the small port that goes to the breather nozzle thing.
My choke was floppy and the flap stayed open until I adjusted the choke element. Now it starts closed and has a spring to it when pushed open. The truck hasn’t ran long enough to warm up to see if it opens by itself. The vacuum thingy near choke operates when I manually checked it with thumb over the end of the port.
I had to back the main screws up front back several half turns to get it this good even. So I’m pretty sure they wereentnletting air/fuel in. They still may need to be unscrewed some? Maybe 3 turns out so far.
Idle speed screw? Not touched it. Fast idle cam screw? Haven’t touched it. The screw under the choke element and the screw under the throttle linkage is what you mean?? I haven’t touched them. But they may have been wrong to begin with. (Field find sitting since 96)
It runs if I give gas. I let off and it dies within 3-5 seconds.
My choke was floppy and the flap stayed open until I adjusted the choke element. Now it starts closed and has a spring to it when pushed open. The truck hasn’t ran long enough to warm up to see if it opens by itself. The vacuum thingy near choke operates when I manually checked it with thumb over the end of the port.
I had to back the main screws up front back several half turns to get it this good even. So I’m pretty sure they wereentnletting air/fuel in. They still may need to be unscrewed some? Maybe 3 turns out so far.
Idle speed screw? Not touched it. Fast idle cam screw? Haven’t touched it. The screw under the choke element and the screw under the throttle linkage is what you mean?? I haven’t touched them. But they may have been wrong to begin with. (Field find sitting since 96)
It runs if I give gas. I let off and it dies within 3-5 seconds.
