hey guys here is one that has been beat to death but i cant find what i need anywhere..i have a f100 302 auto 2bbl carb there are no vacume lines at all and it looks like some one has stripped about all the non vital parts out of the engine compartment im gonna rebuild the carb this weekend and i was wandering if someone can tell me what vacume lines i will need to hook up to make the motor run decent ive looked at the vacume diagram on autozone.com but i cant hardly make anything out of it can someone tell me where the lines go from and to in plain english all those abreviations cunfuse me thanks for any help you can give

 

Alright, you should have a large vacuum line off of the intake manifold to the Brake booster. If the truck has a automatic transmission you'll also need a small vacuum line off of the manifold going the transmission shift modulator.

If the truck has a vacuum controlled AC and heat you'll also need a line running off the manifold up to a vacuum tree on the passenger side of the engine compartment.

You'll need a vacuum line for the vacuum advance on the distributor, this vacuum line runs off the carburetor though, not the intake manifold. You'll also have a larger vacuum line off of the carb going to the pcv valve.

Basically if your engine is anything like mine you'll have a vacuum tree on the front of the intake, and on the rear of the intake. I run my brake booster line, and tranny modulator lines off of the rear tree. I have nothing connected to the front tree.

On the passenger side of the carb you'll have a couple vacuum ports or nipples. Attach your vacuum advance distributor line to a small port on the carb, and attach the pcv line to the larger port.

Also be sure to block EVERY unused vacuum port. Do yourself a favor and use actual vacuum caps to plug them off, don't just shove a screw or nail in there or something.

That should be enough to atleast get the engine running normal, well normal as far as vacuum is concerned. Sorry I cant help with vacuum routing to emissions components, I torn all that crap out. Basically I have 4 vacuum lines under the hood, its quite simple if you eliminate all the un-needed junk.

 

i have mine run about identical to jimbo's however i wanted to note that if he has an AOD tranny there is no vacume to it...just a TV Rod, also i have found that those little rubber vacume cap get brittle quiker than u wud think so i usually carry an assortment with me so i can switch them out when i notice one getting bad.

 

thanks guys this will be alot of help. jimbo that is exactly what i was wanting to know..ill try to hook these all up tonight and see how she runs