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]

Plugged POE

 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.

[novadude]

Secondary air bleed tube would have no effect on idle, but it would definitely affect WOT secondary metering.

[Ponchonutty]

So this is a late 80’s Chevy style carb body with the top of mine after installing the missing secondary cam. Once the o2 sensor warms up, you can see she’s now twice as rich as it once was. So, rebuild number 3 on the way.  DO NOT SEND A CARB TO EDEN, NC!

https://youtu.be/KID_MnNmRJ8?feature=shared

[Ponchonutty]

Well my stopped by my buddy's shop to see what all he's found so far.  He said he was appalled at how dirty the inside was.  You can see the old gasket that was reused.  He said chunks of carbon fell off it when removed.  Also the jets all look used.  He said although there's nothing technically wrong with reusing parts, a "professional" would never do that.  Everything is nice and super clean now with no old residue left.  He said "no wonder why Classic Carb Rebuilder said if this is opened, warranty is voided."  I told him I already sent it back once and he denied warranty saying my fuel was contaminated.  He then asked how many tanks of fuel I ran through and I said at least 2.  He said every fuel sample he's taken is fine.

[Ponchonutty]

Other side of gasket

[Ponchonutty]

Looks good and clean now.  Buddy also said it looked like subpar parts were used too

[Kenth]

With a sufficiently weak preload on the spring to the air valves you can make them open whenever you want.
The same settings in a car the car willl nose dive at WOT.

[Cliff Ruggles]

The only advice I can give here is to avoid commercially "remanufactured" carburetors.  I woln't touch on here and recommend others to the same.

BTW, Holley is one of the WORST companies to ever touch a Q-jet.  Every single one from them I've seen has been a complete pile of bovine excrement......FWIW....

[Ponchonutty]

The only advice I can give here is to avoid commercially "remanufactured" carburetors.  I woln't touch on here and recommend others to the same.

BTW, Holley is one of the WORST companies to ever touch a Q-jet.  Every single one from them I've seen has been a complete pile of bovine excrement......FWIW....

Yes I've known this for decades and wasn't surprised when Tim said what I sent was junk.  I sent him a virgin carb to rebuild twice still having the same issue plus now running super lean with reused parts and junk new parts.  over $700 deep when all of it is added up.