Why does my truck run better half choked?

[dhughins]

I got an 84 with a older crate 350. It has a Rochester 2jet on it and I have problems ever since I got home with it. I have taken it apart and rebuilt it. It starts fine but when you push pedal it wants to die and you have to feather it. Doesn't matter if cold or hot. So I unhooked the choke pulloff and it runs better half choked. The choke is not closing completely something on linkage is stopping it. But when I push gas it doesn't die. So I assume it is running too lean but why? I've adjusted the mixture screws to the highes reading on my vacuum gauge when I connect it to carb. If I turn either 1 the vacuum start going down.

[geezer#99]

Vacuum leak!!

[rich weyand]

Either that or the seal on the accelerator pump is shot.

[dhughins]

Put in a new accelerator pump with rebuild. I'll have to keep looking for vacuum leak. Haven't found it yet.

[dhughins]

I think that was it. I found a small port in back of carb that originally the vacuum from the choke was connected to. I have pictures of my carb before anything was done and I could see that hose going to back of carb. I'll have to see how it rides to work in the morning.

[dhughins]

Now since I found that should I check my mixture screws again?

[geezer#99]

Of course!