Originally Posted by ap72
I have an Edelbrock 1406 (600cfm) carb on a 2.3L 4 cylinder and it runs fine.... So you can throw your "too much carb" theory in the trash can. Its car from too much carb especially when the secondaries rely solely on air demand.
Edelbrock carbs are usally Carter four barrel carbs and not vacum secondary type carbs. all four plates open staggered with cable on my 1406 no electric choke carb. Most edelbrock carbs are the same i think they are rebranding some other types for vacum secondary thunder series carbs.
But tuning is problably the issue. What is it doing. Common problem with those carbs is the accelerator pump must be set to its max setting and them sometimes upgraded for them to wok well in quick off idle throttle movments. Are they both electric choke or manual choke or a mix of both. You may have just gotten them mixed up. manual choke carbs come tunned for performance and electric choke models are tunned for gas milage. you should have two manual choke carbs on the tunnel ram. Yes it will require some good warm up time and a good choke cable setup.
I am betting someone with 500 cfm edelbrocks will trade you straight up and not blink. that being said I would just get them dailed in. Edelbrock is pretty good for phone support if your handy with carbs. if not may need some tuning time with local guru. If they need to be replaced let edelbrock determine this can you may be able to work a good deal for some remanufactured 500 cfm models.