Rochester model B blues. Please help.

[rookierodbuilder]

Hi there, I have a 66' c-10 with a 250 inline six cylinder motor. At one time, I had the truck running but one day it decided to quit and only run if I poured gasoline into the intake manually. I checked the fuel pump and it worked fine. so i decided to rebuild the carb. after checking all my passages if they are free or not, the thing still will not run for lack of fuel. Note: I understand that you have to soak the plunger in oil for the accel. pump to work, (I soaked mine in WD-40) yet it is still not pumping properly. Have i used the wrong soaking procedure, or is there another problem i should check?

[neto]

Do you know if there is gas in the bowl? Could the needle be stuck? Just a thought.

[Bob Magana]

What about the Vacuum Advance Lines?

[skullboydeath]

Alot of things it could be on these old carbs make sure the rubber seal is good on the accel pump if not lubed enough it will tear when you install it . Check the float make sure its adjusted right and no holes are in it. And check the little metal filter that in where the line goes in Every kit i have every bought seems to be missing it. Na make sure you used the right gasket that seals the bowl to the top most kits come with a couple of them and they look almost the some but the wrong one will block so holes

[rookierodbuilder]

okay. i dismantled it again and found that there seemed to be a passage above the check valve for the accel. pump, should that part of the gasket be have a hole, or is it there for a reason? Also, if it is of any help it is a model BC to be exact.

[ol Curt]

Yes! Some kits have a gasket without that hole. You will need to carefully make one in the gasket or order a new correct gasket.

[Eagar1]

Make sure your throttle shaft does not have too much play, if it does you could be sucking so much air that it won't even draw from the idle circuit.
If you are careful, you can fix this by dissasembling the lower plate, and they make bushing kits, or you can use copper pipe or even JB weld if you are good enuff with it. I would also put a fuel pressure gauge, and or a fuel filter with a glass sleeve or a plastic one that you can see into to make sure you are getting fuel to the carb.
Brand new needle and seats can sometimes stick, with the top of the carb off, let the fuel float drop and look to see if the needle drops, if not, pull it open or blow some air in there, then with it open spray some WD 40 on it and let it sit a bit and do it again. Also make sure your choke is opening. Sometimes when reassembling, the internals can come apart and the choke may look open, then suck closed or stay open, either way it may foul up the starting proceedure.