Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
Setting up the new carb--pointers?
F250 Restorer:
I finally got around to working on the carb again. I emptied it, turned it over and could only see a line of light around the edge of the primary and secondary butterflies. I was able to idle it down to eight-hundred rpm, took it for a drive, but got back and it was up to 1000 rpm.
I noticed there is a slight ooze of fuel from the booster holes, just getting it wet. I also noticed that when I manually push the throttle closed the idle drops 100 rpm.
Is it normal to have the fuel spray out when I disconnect the fuel line? I've never seen that before.
I should also note that I sprayed around the base with starting fluid to no affect.
F250 Restorer:
I loosened the s. flaps and played with then to get them positioned correctly.
All four butterflies look seated. Still it idles at 1,000 rpm. I can get it down to 800 rpm by screwing in mix a bit, but then it runs rough. It also surges 100 rpm up and down.
Cliff Ruggles:
It's got to be getting idle air from someplace. If all 4 throttle plate are fully seated, the engine should stall out.
Did you eliminate any idle bypass air in the baseplate?
Plugged the vacuum hole leading to the choke housing for the hot-air choke?
Linkage adjusted so the primary throttle plates are fully closed when it's in use?.....Cliff
F250 Restorer:
It's got to be getting idle air from someplace. If all 4 throttle plate are fully seated, the engine should stall out.
Did you eliminate any idle bypass air in the baseplate? If that wasn't mentioned in the book, then I did not do it. How do I do it?
Plugged the vacuum hole leading to the choke housing for the hot-air choke? I installed the housing from a latter model with elec. choke. The v. hole does not continue through housing.
Linkage adjusted so the primary throttle plates are fully closed when it's in use?.....Cliff yes.
F250 Restorer:
--- Quote from: F250 Restorer on December 09, 2011, 09:18:37 AM ---It's got to be getting idle air from someplace. If all 4 throttle plate are fully seated, the engine should stall out.
Did you eliminate any idle bypass air in the baseplate? If that wasn't mentioned in the book, then I did not do it. How do I do it?
Plugged the vacuum hole leading to the choke housing for the hot-air choke? I installed the housing from a latter model with elec. choke. The v. hole does not continue through housing.
Linkage adjusted so the primary throttle plates are fully closed when it's in use?.....Cliff yes.
--- End quote ---
by the way, the carb # is: 17058504
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