Okay, I got the truck running, I put a new Edlebrock 1407 carb on and now there is no power. I am having a hard time figuring out when all the old vaccum lines go. For instance, I have to yellow vaccum hoses, a metal hose in front of the carb. One yellow hose looks like it goes to the distributor. Oh, and now I have brake fluid leaking from the rear drum area.

 

Surely the new carb didn't cause the leaking break fluid

the metal hose should go to the big pipe in the center front of the carb, and the vacuum line on the distributer should go to the ported vacuum source on the carb which I believe is the vacuum port on the passenger side of the front of the carb. the vacuum port on the drivers side should be plugged with a vacuum cap (in the most basic setup) for your truck to run smoother, if any of these are left open, that is probably why it don't run good anymore.

 

Okay, thats the setup I have currently, except for the drivers side vaccum line, which I will cap. I know, the new carb didn't cause the bake leak, it's just another thing I need to fix and since I had surgery a few weeks ago I am not really in the fixing mood. Thanks for your help, I will give it a try. I have to metal lines in the front of the carb. one is all metal and sits flush agains the intake manifold.

 

Verify your vacuum advance diaphragm is not ruptures and is attached to ported vacuum. Running rich or lean? May have to change jets and/or rods. Secondary air valve adjusted properly? Opening too late?

 

with an edlebrock carb you need an adapter plate that goes between the carb and intake manifold or the secondary's won't open causing your no power problem.the holly carbs have small secondary's,edlebrocks have large secondary's. i had to do this on my,86 460 f250.it's just a cheap mister gasget carb adapter plate,i think mine was $20.oo.

there should be a vacuum diagram on your rad support.

if you got brake fluid leaking from the booster your master cylinder is leaking past the back seal.needs to be replaced

 

okay, so I took a look at the carb, there is a plate but that looks like it is for the egr valve. I took a look at the carb and the secondary's opening is 1.5'' which is the same around the bore. Do I need another plate between the stock plate which you can see in the picture. I am having so many issues with this truck.. And, the vaccum line picture works with the stock carb. The Edlebrock does not have enough vaccum ports.. I just need some help.. I am getting to the point where I might just post it on craigslist and get rid of it.

 

Need to know what year it is.

Better pictures (bigger with more light) would help. To get a earlier truck running ok, you need to have the distributer hooked up to the spark vacuum port on the carb. and everything else on the carb plugged. Is the carb new? There is also a hole that needs to be plugged, I forget if it is on the front or back (they have two holes but you only need one) this will cause a major vacuum leak and next to no power.

Make sure the carb is snugly bolted down with gaskets in place, and start her up.

All the other vacuum lines can be added one at a time in accordance with your diagram to see where your vacuum leaks are coming from.

With out good pictures or more info, we are shooting in the dark.

 

DUde this isn't rocket science. Not sure what you mean by secondaries are only opening 1.5", not sure where or how you measured this. Opening would be measured in degrees, if anything. Are you able to open the secondaries completely with the throttle? Completely means the blades are verticle.

As for the vacuum lines. Look on the diagram if they go to ported or manifold vacuum. Then put them to the appropriate place on the Edelbrock carb. Buy some vacuum T's if needed.

 

Make sure you plugged that large hole in the back of the carb with either a line or the plug conviently provided by edelbrock. Leaving that hole open will certainly make it run like crap.

As for the secondaries opening, if the throttle plates will open all the way, then they should work fine.

One item I have seen edelbrock carbs suffer from, even right out of the box, is fuel dripping into the primaries when the engine is running. This is usually caused by the metering rods binding, so the vacuum cannot pull them down as it should. If this is the case, loosen the screws on the cover plates and make sure the rods are fully seated and travel freely.