All of a sudden since installing some long tube headers on my sb the darn thing only runs when its full choked.... I don't think headers have anything to do with it but somethings changed..... when I start to open it back up when engine is warmed up it just dies..... its an Edelbrock 600 cfm carb ... manual choke .... stock outta da box... # 1405..... ran in the screws and backed them out 2 turns each.... runs nice with choke on.... and when I start to open the plate back up..... the idle starts to pick up a tad then as it opens more it just quits runnin .... any trouble shooting ideas????
