The carb off the Pontiac worked fine, when I put it on earlier this morning. The choke was not working, as the electric part was broken- and I couldn't kick down the idle, obviously so it stuck at a higher speed.That vacuum leak for a hot air choke ain’t nothing to worry with. It is designed to leak pulling in air from the back of the carb and through the heat tubes into the choke housing. But if it’s bugging you a drip of solder or rtv and plug it. It would get dirt in there the way it is now so if it is a hot air choke that would be bad. But weren’t most mid 80s Chevy carbs electric choke?
Of course you will want to plug that big hole the choke shaft goes through as even with the air cleaner on tha hole will suck in dirty air.
Since you removed the choke stuff there’s no fast idle setting to worry about so that ain’t it.
Is this a CCC carb or no? It sounds like a no because of tweaking with everything.
First off, stop.
If the carb was working on your ponti just fine, but the original carb on the Olds was acting up and now the ponti carb is acting up, the common denominator seems to be your Olds 305. Correct me if I’m wrong here.
How are the carb and intake gaskets? EGR stuff? Anything leaking air where it shouldn’t? Power brake line snug?
Take the time and rebuild that Olds carb and put everything back to factory specs then go from there.
That’s where I’d start.
But not the high RPM like afterwards, all I did was drive it for less than 1 minute, realized in gear it still was too fast, so I shut it off, adjusted both screws.
Then, when I turned it back on thats when everything became an issue. That said, yeah I am going to rebuild both my Olds carbs since they were before anyway.
I will post back with results tomm, and try a few more things.