Carb question.

[Hotrodlincoln]

What's the diaphragm like thing attached to the front of the float bowl on the 2150? Its between the throttle pump and fuel filter. It has a nipple on it for a vacuum hose which has never been there since I've owned this truck. I did cap it off with a rubber end cap which became brittle and just broke off after about 9 months and it smelled like gas pretty bad, so what ever this thing is, I believe it's leaking. Any ideas? Also where would I hook up a vacuum hose for this thing if I can find a replacement?

I just did the Duraspark conversion and have plans to upgrade to a holley carb in the future, but between bills and the price of gas, cash flow isn't so great right now, so it will have to wait. But Id like to see if I can get this carb to work well enough that the engine doesn't stall whenever I hit the gas while its cold. It probably wouldn't even be an issue if I had a manual transmission.

Thanks in advance.

 

[Eric Kropp]

That diaphram thingie hooks to a blue plastic vacuum line via a molden on 90 deg. elbow and goes to right side of the pick-up and attaches to a vacuum solenoid and that is electrically controlled possibly by the TPS, though I am not sure what controles it. If you don't live in California with all it's smog legalities, it probably does not matter. You should have diagram on between the radiator and the grill that will show the vacuum line lay out.

Eric<><

 

[Hotrodlincoln]

Oh, I see. Well considering none of the solenoids on the passenger fender are there anymore, I wont worry about it. Ill just plug it up with some JB weld so it'll stop leaking.

 

[litleblue]

Originally I think the thing you are looking at was called the TCP, (temprature compensated pump). When the engine was cold the diaphram was positioned so the accelerator pump would have a higher volume. After the engine was warmed up the diaphram was repositioned and the accelerator pump would pump less fuel.