1983 F350 460 Cranky when hot starting

[ArdWrknTrk]

Christopher,
If it died on you immediately after leaving the gas station, there's no way it is vacuum in the tank.

I'd maybe turn it up a bit?

[Gearhead]

You can try this also. One of two things could be happening in that the fuel tank isn't venting properly, so as the fuel in the tank gets warmer the vapor pressure rises and can force fuel past the float. Or it could be going into a vacuum and not allowing it to draw fuel when hot. Try removing the cap and run the vehicle and see if it changes. Check choke operation, try looking down the carb throat, motor off, engine hot, throttle closed to see if fuel is dripping.

[Chad9]

The carb is aftermarket i believe

[ArdWrknTrk]

Does it have a large vent tube in each float bowl?

That's probably the easiest way to know.

[Gearhead]

I did forget something. On some applications there was a carb vent valve, for emissions sake. Would have vent tubes with hoses attached to float bowls.

[ArdWrknTrk]

AFAIK all 4180 carbs have these vents -it's their distinguishing feature-

At least the one on my '85 notch' and my '87 F-250.

[Chad9]

Went to try adjusting float level and find that mine is of course, non adjustable type

[Gary Lewis]

They are adjustable, just not externally adjustable.  You have to remove the bowls and adjust them that way.

[ArdWrknTrk]

I think you should probably determine that they're out of adjustment before opening them up.

If you do I'm going to suggest you use the genuine Holley blue float bowl gaskets.
Also be sure all those little clutch drive screws in the metering blocks are *tight.

[Gearhead]

I agree, make sure it needs to come apart. Excuse me for playing Captain Obvious. Quickey test for power valve issues, turn mixture screws in all the way. If the truck continues to run, no matter how poorly, power valve is bad. Float too high? With vehicle at operating temp, run it, shut it down, and immediately look down the carb, don't touch throttle linkage, if fuel is dripping float is too high. Not all the Ford application carbs had brass floats. Some had a plastic like material that I have seen soak up fuel. Another test for high floats if under hard accel or hard braking the motor stalls, or bogs down, it would indicate high floats. The only time I came across low floats the car wanted to stall under wide open throttle cuz it sucked the float bowl dry.
I apologize for stating the obvious.  Hopefully this helps.

[ArdWrknTrk]

I'm pretty sure any Holley. With non-adjustable floats has power valve blow-out protection built in.

TTBOMK, they started this in 1991.

While I can't read the build # on the choke horn with my phone, it sure looks like an 0457-8 to me.

[Chad9]

Got around to checking the fuel pressure today, about 3 psi from the electric in tank pump

[Chad9]

Tried another gauge showed 4.0

[Gary Lewis]

Where are you measuring the pressure?  Ahead of the tee or after?  And, was this with the engine hot or cold?

Three to four psi is adequate to do the job, but if it drops when things heat up then you could have problem.

[ArdWrknTrk]

You don't need to check pressure, you need to check volume.

Bill will back me up on this.