Posted by Gordon Maney on Saturday, June 28, 2003 at 5:09PM :
In Reply to: Help Needed with Carb question!!!! posted by Tug Boat Lonnie on Saturday, June 28, 2003 at 4:37PM :
You manage to ask several questions, the least important of which at this point is where a hose might go that could be connected to that port. Your concern right now is engine operation.
Cut a piece of good, live rubber hose about 1-1/2 inches long, put a plug (wood dowel or bolt) in one end and push the other end of the hose on the port. That solves your vacuum leak. In general, diagnosing vacuum leaks can be assisted greatly by using a spray can. Shoot the spray at any parting line, port, or other suspect place. If the engine speed smoothes out and slows down, that indicates a vacuum leak.
Check the tightness of the carburetor mounting bolts.
What is in the spray can you ask? Well I am making no recommendation, for liability reasons, but suffice it to say you would rather not catch your truck on fire. Something like WD40 would be more messy, but safer. I have used spray carburetor cleaner and on occasion, spray brake cleaner. I leave you to make the choice.
I don?t really see your lack of power concern to be a vacuum leak problem. If you had such a big vacuum leak that it caused a lack of pulling power, it would not want to idle at all. You may have several problems in that carburetor. The upside of that is that most carburetor problems are caused by dirt, and sometimes bad gaskets. It is possible that the throttle shaft is worn and loose; that can cause a vacuum leak. Spray your liquid at the ends of the throttle shaft to check that.
My question for you.... How did you take that picture? It is very nice as an online photo.