coolhandluke
Well-Known Member
So, I bought a rebuilt carburetor off a guy on here to replace my 2 barrel. My car's a bone stock '72 dart, 318 auto. The carburetor is a 600 cfm vacuum secondary holley with electric choke. It has electronic ignition, if that makes any difference. Anyway, I got it all hooked up and it has a pretty bad stumble off idle before it picks up. The floats are set correctly and the timing is set at 10 btdc. It's running too rich, the plugs are black, which I know is one problem. I checked and the jets that are in it are 62's, while from what I've read online stock size jets in this carburetor are 69. I originally thought the secondaries might be kicking in too soon causing the stumble, but it does it in idle as well as drive. I took the diaphragm apart and it already has the black spring in it, so I don't think that's the problem. The accelerator pump diaphragm is green, which means it's a 50cc?
So, what could my problem be? Should I just try to jet it down and size and see what that does, or could the 50cc accelerator pump diaphragm be causing the stumble?
Sorry if I missed any information anyone needs to help me out
Thanks!
Luke
So, what could my problem be? Should I just try to jet it down and size and see what that does, or could the 50cc accelerator pump diaphragm be causing the stumble?
Sorry if I missed any information anyone needs to help me out
Thanks!
Luke