That "kaBOOM" is probably the cause of the constant problems. When a Holley has a backfire it ruins the powervalve. Doesn't run right until it is fixed. I think there is some sort of an update kit which protects the powervalve when it experiences a backfire but don't hold me to that. I agree 100% with the Edelbrock. Darn good carb if you have to have a carb. |