start up went good but

[slowdown]

So I just finished the cam break in and the first start up of my rebuilt engine. Everything went good, no leaks no funny noises from what I could tell over the engine idled up. Which is where the problem is. The engine fired right up but screamed, I had to jump out and work the choke to get it to idle between 2500 3000 1500 for about a half an hr. I had a timing light hooked up to it but couldn't get it to stay where I wanted it but it wasn't jumping around so it's 32 degrees at 2500 It was kinda hard keeping it at the rpms for the cam break in and holding a timing light and trying to turn the distributor all at once. I torqued the intake and used all new gaskets for everything could this be a vacuum leak? all new hoses as well.
The carbs a 680 quick fuel vacuum secondary electric choke, could my choke be stuck? The carb hasn't seen many miles at all. I had an old car back in the 80's that would scream when u first started it up but idled down after it warmed up a bit. I have to get the timing set but with it wanting to wind up I need to figure out whats up before I start it again. I'm letting it cool down a bit and I'm going in the garage to drain the oil and look around a bit.

 

[Abodybomber]

First ,Congratulations on a good break in. Have you run this carb,personal before? Check the linkage on the fast idle cam,for sticking/binding. What intake manifold,a Performer ? Performers need a thick gasket/thin steel plate adapter ,to seal a Holley flanged carb properly. That could be a cause,for a vacuum leak.Take a spray bottle of water,spray it on the baseplate area running. If idle speed drops,vacuum leak.

 

[67cudafb]

Should be idle screw on driver side of car to adjust RPM. Should be two one for choke on and one for throttle linkage.

 

[slowdown]

I have used this carb, it was on the car last fall before I took the engine apart. I put it in a plastic bag and put it on the shelf till I got around to finishing the engine. The carb was fine other than it was pig rich, but since then I changed jets and adjusted the floats and regulator and did run the carb on the car before I tore the engine all apart after losing a lobe on the cam. It idled fine last time it was on the car.
I did get the thick manifold gaskets from edlebrock for the intake I have. It's a edlebrock air gap. I am not a carb guy so I'm hoping this thing fixes itself. lol.. Everything on the carb seems to be moving freely. I am working alone on this thing man another set of hands would be nice so when I fire it up a guy can hold the throttle plate down a little to keep it from screaming till I can snoop around for leaks and such. I did use all new gaskets for the carb as well, and I do believe the carb is based on the holly platform. I have the idle screw adjust out and I don't see the other screw. Theres only one screw on the drivers side of the carb. It's a electric choke with one of those choke housing things on the passenger side with a hot wire and a ground going from the choke housing to the carb.

 

[Abodybomber]

I have used this carb, it was on the car last fall before I took the engine apart. I put it in a plastic bag and put it on the shelf till I got around to finishing the engine. The carb was fine other than it was pig rich, but since then I changed jets and adjusted the floats and regulator and did run the carb on the car before I tore the engine all apart after losing a lobe on the cam. It idled fine last time it was on the car.
I did get the thick manifold gaskets from edlebrock for the intake I have. It's a edlebrock air gap. I am not a carb guy so I'm hoping this thing fixes itself. lol.. Everything on the carb seems to be moving freely. I am working alone on this thing man another set of hands would be nice so when I fire it up a guy can hold the throttle plate down a little to keep it from screaming till I can snoop around for leaks and such. I did use all new gaskets for the carb as well, and I do believe the carb is based on the holly platform. I have the idle screw adjust out and I don't see the other screw. Theres only one screw on the drivers side of the carb. It's a electric choke with one of those choke housing things on the passenger side with a hot wire and a ground going from the choke housing to the carb.

I hate the "alone" break in gig,look to loosen the choke 'stat housing. Hopefully, they are still marked "rich " to "lean" . If it lists"rich" ,do that for now. ( Better yet,a Carb without a choke temporarily).

 

[slowdown]

I hate the "alone" break in gig,look to loosen the choke 'stat housing. Hopefully, they are still marked "rich " to "lean" . If it lists"rich" ,do that for now. ( Better yet,a Carb without a choke temporarily).

Thanks I will try tonight when I get off work.