Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
1979 Firebird Trans Am aka the turdbird has problems
Ponchonutty:
Video of his test of my carb https://youtu.be/Eeq3wzPrvoc?si=HCe6-SVF82VlPvO1
77cruiser:
That about normal for just winging the throttle. I thought he had it on a dyno.
Ponchonutty:
I don’t think the engine is under any sort of load. Here’s another carb about a day later. It too was for a Pontiac https://youtube.com/shorts/Ugl6HN0t3A8?si=HOU7m8e1-4aUKyKO
Cadman-iac:
--- Quote from: Ponchonutty on October 24, 2025, 06:48:37 AM ---Plugged POE
--- End quote ---
That carb does not have the POE, (pull over enrichment), what you have circled in your picture is the secondary air bleed tube.
If it had the POE system, there would be a 3rd set of tubes located in the slightly larger holes just ahead of the air bleed tubes, and these would be longer and thicker. In addition, the discharge holes for the POE are located just above or below the choke blade when it's closed.
If those are not there, the carb never had a POE system. If there are discharge ports, then it's possible that someone pulled the tubes at some point and didn't replace them.
Ponchonutty:
Sorry. New to the quadrajet terminology. From reading about a plugged secondary air bleed tube it said this condition would result in rich idle conditions. This can't be true since my carb runs extremely lean.
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