First of all, this is not for a Ford truck, but for my recently purchased 1967 Mustang with a 289 motor and a Autolite carberator. There is so much knowlege on this site, I have to ask here before I get discouraged by my new toy.

The tag on the front shows this number, "D1ZF AA". The car sat for several years with just under a 1/4 tank of gas. It started on the old gas but the needle seat was stuck and caused gas to shoot out of the carb on the very first attempt to start, but we took it apart and checked it and messed with the float and that problem went away. It idled and revved just fine after that for about 45 minutes. I shut it off and did some other work to it and was going to test my recently bled brakes until a new gas/carb problem arose.

It starts fine but dies within five seconds. I added about 3-4 gallons of fresh gas and some seafoam after this problem popped up. I can keep it running but I have to feather it aggresively to keep it running at a higher rpm. Just as soon as I get it to even out at a higher rpm, it'll start dieing again and I start the whole process over. We took the top part of the carb off and checked the jets and metering rods which all were open and checked the needle and needle seat, again. The accelerator pump seems to shoot gas just fine into the carb with a nice stream, which we're guessing is keeping the car running when I'm (aggressively) feathering it.

Could my needle and needle seat or float be causing this? We're getting enough fuel to the carb and the fuel filter blows air freely. Any ideas would be greatly appreciated.

Thank You!

 

If it sat for a long time, I'd probably just go ahead and rebuild the carburetor. Chances are there is some crud in the idle passages, and sounds like your needle and seat were pretty dirty anyways. A good rebuild and tuning will probably take care of it.

Backing out the idle mixture screws or increasing the idle speed may help for now, but a carb. rebuild is the best way to go.

 

Yeah, we cleaned out the gas tank with muriatic (not sure if that is spelled right) acid, which really cleaned the inside of it out, only to have the same results. We took the carb completely apart and found the power valve wasn't in the best of shape (dry rotted). We cleaned the carb out with carb cleaner and we'll rebuild her tomorrow night and go from there.

 

Success!!!!

The new carb kit fixed it. I was able to drive her down to the quick store for some fresh gas and a 12 pack. Now I just need to figure out how to tune it up just right.