Start issue ,,,,

[sacramento_ford]

well. heres what ive done so far,. new points, cap, rotal, wires. solenoid, rebuilt carb. coil is good. timing is set. new fuel pump
and new batt, heres a youtube vid of me trying to start it. sometimes when its idleing the idle goes up and down . thank for any tips. http://www.youtube.com/watch?v=cugf2CeHlKs

[towtruckerfour]

Hey Sacramento_ford. I'm thinking carburetor adjustments maybe. Seeing how it does run, that seems to eliminate plugs, wires, cap, rotor, coil and fuel pump. I'm a newbie myself at carburetor rebuilds. Is the float set at the right measurement? Any vacuum leaks? Just my thoughts?

[knightfire83]

Definitely not getting enough fuel. Could be float adjustment, mixture screws at the base of the carb or a vacuum leak.

I'm gonna discard fuel delivery to the carb. since it runs decently with the accelerator held or the choke on.

Also gonna discard timing since you say it's set correctly.

I'm thinking vac. leak, check the carb. base gaskets, and pcv, breake booster hoses. The mixture adjustment should be around 2-3 turns out on each.

[sacramento_ford]

Definitely not getting enough fuel. Could be float adjustment, mixture screws at the base of the carb or a vacuum leak.

I'm gonna discard fuel delivery to the carb. since it runs decently with the accelerator held or the choke on.

Also gonna discard timing since you say it's set correctly.

I'm thinking vac. leak, check the carb. base gaskets, and pcv, breake booster hoses. The mixture adjustment should be around 2-3 turns out on each.

thanks what is the way to test for vac leaks,,

[towtruckerfour]

I just take carburetor cleaner and spray around the base. The motor rpms will change a little if there is a leak. Easiest way I know of.

[sacramento_ford]

hmmmm there is a little ignition unit at left of radiator , u dont think its that, i neen to get my manual choke installed correctly also, that will be step one and them i will sprray carb for leaks, i do hear a hissing (leak) somewhere, man what a diffeence when installed a ignition solenid. carb sounds good too,

[Sam I Am]

The voltage regulator is to the right of the radiator. Battery is on the right side, starter relay is on the right side.
All vehicle directions are given as if you are sitting in the vehicle facing forward, not as if you were standing in front of it looking at the engine bay.
The issue doesn't sound electrical.
It sounds like somebody mixed up the idle bleeds and screwed them into the wrong holes, or the 4 corner idle isn't adjusted correctly, or both. A friend of mine just went through the same thing. It would run great while he was giving it gas, but it never idled well.

[Banjo]

Harbor Freight sells a great vacuum gauge that's less than $20 and is a very large dial so easy to see. If it's floating any, you'll see it. I know I was having vacuum leak problem and couldn't locate w/carb cleaner spraying everywhere and bought one and it confirmed it and I kept looking and my modulator valve down on trans had a crease from being it and was leaking there. I wish someone had bought me a vacuum gauge when I was a kid decades ago and it woudl have saved me so much trouble over the years. That and a 4 inch side grinder are so time saving for so little investment.

[george worley]

My automotive shop teacher in high School was a first class mechanic and he told us one the first and best dianostic tool you should buy was a vacuum guage. I took his advice and I use it more than I use my timing light,or dwell meter. It is handy on newer cars as they have so many things run by vacuum. My vacuum guage is Sears that is so old that it says "ALLSTATE" on it, thats tells how long its been since I was in high school. George worley class of 1963.

[knightfire83]

It sounds like somebody mixed up the idle bleeds and screwed them into the wrong holes,

I'm guessing you mean the idle mixture screws? They should be identical.

or the 4 corner idle isn't adjusted correctly,

Whaaaaaat???

The Autolite 2100/2150 is about the easiest carb to rebuild, you have to work pretty hard to screw it up... but it is a possibility that something had gone wrong during the rebuild.

Some applications are pretty particular about which carb. base gasket you use too.....

[sacramento_ford]

carb was done perfectly. maybe ill adjust the choke cable and go from there, then check vac, yeah carb was done perfectly. only thing i would replace is the used, orange pump diaphram u know that little rubber flat orange thing, the one i have on the is ok, they break easily once u pull on them ,

[towtruckerfour]

You said you can hear hissing? Check for any open inlets or outlets or cracked hoses around the carb. My wifes 70 has a 302. There is a tower on the back of the motor that I can't remember what is for. I have two rubber caps over the ports. If one comes off, it doesn't run right. I just thought of something you might check. When I rebuilt my carb, I put the acceloretor pump spring and diaphram in backwards and the truck wouldn't start. You might check that. Once it was in right, the truck engine ran great. Once you get the choke set, that will help. Let us know what you find.