MISERABLE Mileage.............

Couple of things if you are still fighting this. Was just reading the bbd manual a bit yesterday. Make sure your carb is good. A careful rebuild may be in order and make sure the throttle shaft is not worn and needs rebushed.

In the first few pages of the bbd manual it mentions to make sure you have a good bowl cover gasket on the carb. The bowl needs to be sealed for the vent to work correctly. Says that an airleak here can cause a mileage complaint. Would be worth checking the mating surfaces are clean and straight too.

Also mentions making sure the bowl vapor vent adjustment must be made to specs. Says if the vent opens too far or hangs open it will allow an external vent to the bowl resulting in poor mileage.

Anyway, hope you figure it out as from all I've read on the / board that is very poor mileage and something is out of wack. Once tuned the good mileage, from what I understand, is from the car running in general operation on just the one barrel which is smaller than the single barrel carbs in size. If you put your foot in it the other barrel comes into play. You will have more power, but fuel mileage will suffer. Seems a popular tip to hook up a vac gauge and drive using that. One specifically for showing you fuel mileage range you are in. Driving with an eye on that is said to help. You should be getting much better though.

Let us know how you got on.

Cheers