1976 2.0 question, throttle body Options

[jimkelly]

Up untill a few days ago my car was running fine but all of a sudden it started to back fire when I decelerated and starting it became difficult. One thing that has been found is the both the vaccum hoses - light blue and the red to the distributor - both pull vaccum at idle and both lose vaccum when giving the motor some throttle. The red is supposed to have little vaccum at idle and gain vaccum with added throttle - correct? We are thinking that my throttle body has gummed up hole some where but at this moment we don't know how the advance hose nipple is plumbed in the 1976 2.0 throttle body - anyone got any ideas or a detailed drawing of how the advance vaccum flows through it? Thanks, Jim

[Dave_Darling]

QUOTE (jimkelly @ Jan 9 2006, 11:36 AM)

I could be mixed up but I think we determined that the red hose from TB goes to where the blue goes on the above drawing and the blue from the air box goes to where the red hose goes to in the above drawing...

You are mixed up--the drawing is correct. The light-blue and red hoses both go from the throttle body, not the air cleaner, to the distributor dashpot. The retard hose (the only one that you have, according to your picture) will have vacuum at idle and the vacuum will drop off pretty rapidly as the throttle is opened. You do not have the advance fitting on the throttle body, so you won't get the advance vacuum signature (no vacuum at idle, a bunch at a little throttle opening, none at higher throttle openings) anywhere.

In other words, everything is just fine. Disconnect the hose going to the advance fitting on the distributor dashpot (that's the one pointing away from the distributor body) and leave the other end of the hose open to the air.

Look for your problems elsewhere....

--DD