[cyclopsblown34]

The part where you said fuel was spraying out of close to the linkage, is it outside the throttle bores near the driver's front corner of the carburetor and points straight up and down actuated with a lever pivoting on a pin on the carburetor body? If so, that is the accelerator pump and fuel coming from there is a sign either the float level is set too high or there's dirt in the seat where the needle and seat are for the fuel inlet to the float bowl. Either one of these requires disassembly of the top of the carburetor to clean the float bowl and readjust the float level.

[lt1silverhawk]

Happy New Year Cyclops!

Originally Posted by cyclopsblown34

The part where you said fuel was spraying out of close to the linkage, is it outside the throttle bores near the driver's front corner of the carburetor and points straight up and down actuated with a lever pivoting on a pin on the carburetor body?

I had a family member watch as I was starting the truck in the first video and, according to him, the fuel was shooting out of a nut by what was later identified as the accelerator pump (maybe it was shooting out of the accelerator pump and he just didn't see it).

Originally Posted by cyclopsblown34

If so, that is the accelerator pump and fuel coming from there is a sign either the float level is set too high or there's dirt in the seat where the needle and seat are for the fuel inlet to the float bowl. Either one of these requires disassembly of the top of the carburetor to clean the float bowl and readjust the float level.

That's what I've concluded as well based on what I've read so far. I'm figuring dirt or other form of debris did get in there. Any tips or guides on disassembling and cleaning the float bowl and readjusting the float level? Don't wana overkill


Thank you all sooo for your continued help. I can't possibly thank you enough for making this an enjoyable learning experience

[cyclopsblown34]

It'd probably behoove you to buy a carburetor kit and float for your carburetor. The kit will have an exploded view of the carb. We can talk you through disassembly and reassembly.

[lt1silverhawk]

Originally Posted by cyclopsblown34

It'd probably behoove you to buy a carburetor kit and float for your carburetor. The kit will have an exploded view of the carb. We can talk you through disassembly and reassembly.

Lol! But of course (I can just hear Jeff Foxworthy going "Well duuuuuuuuuuuh!" in my head now) Thanks for pointing that out Sir!

[cyclopsblown34]

There are some idiosyncracies the instructions in the kit leaves out.

[lt1silverhawk]

Originally Posted by cyclopsblown34

There are some idiosyncracies the instructions in the kit leaves out.

Thats good to know. Then I will continue documenting what I am doing and rely on your pointes and feedback.

However, on a side-note, I am very much tempted to see if I can temporarily run a Holley 4150 in its place (I believe they are both spread bore). That will give me all the time needed to patiently work on this while still being able to move the truck around.

[123pugsy]

Good plan.

[lt1silverhawk]

Originally Posted by 123pugsy

Good plan.

Thanks! And a very happy birthday to you Sir!

[123pugsy]

Thanks ...........I think.

Getting old sucks.

[lt1silverhawk]

Originally Posted by 123pugsy

Thanks ...........I think.

Getting old sucks.

Lol! If I had a $1 for every time I heard that one...

I, for one, am appreciative of your age because it clearly comes with experience and knowledge which you are now using to help and educate the rest of us.

[lt1silverhawk]

In order to keep this thread from getting too lengthy with pictures and data, I will be documenting the carburetor's removal, disassembly, cleaning, rebuild, and tuning here. It will also make it easier for anyone looking for similar information to find that thread without having to read through this one.

Once that thread is complete, I will return to this thread to document anything else that remains.

Again, thank you all for the continued help.

[lt1silverhawk]

Hi All,

Well, after almost two and a half months, the carburetor has been rebuilt with full documentation. I installed it on the truck yesterday evening and got it to fire up today. You can see a video of how it ran here. Can you guys still here a skip?

The next step for me is to check the plugs, making sure the gap is 0.060" and change the wires. I will also try to take it for a spin tomorrow.

[Torque454]

Originally Posted by lt1silverhawk

Hi All,

Well, after almost two and a half months, the carburetor has been rebuilt with full documentation. I installed it on the truck yesterday evening and got it to fire up today. You can see a video of how it ran here. Can you guys still here a skip?

The next step for me is to check the plugs, making sure the gap is 0.060" and change the wires. I will also try to take it for a spin tomorrow.

.060 is too wide, that may be your problem. I believe spec is .035"

[lt1silverhawk]

Hey Torque,

Originally Posted by Torque454

.060 is too wide, that may be your problem. I believe spec is .035"

According to Autozone's site, the gap is 0.045" for Federal emssions models, and 0.060" for California emissions models. IIRC, the previous owner had gaped the plugs at around 0.050".

[Torque454]

Huh, you're right. I never knew that old of an HEI to use such a wide gap. Ive seen some late 80s 4 cylinders to use a .060 gap but never a V8.

My 78 454 takes .035 gap, but thats a big block and if I remember right you are working on a 350. Oreillys does show a .035 on a 77 K10 350 but on heavy duty non cali emissions (which is all I'm used to). Light duty uses .045 for non cali emissions. And of course .060 for the cali engines.

I still question that kind of a gap in that engine, its awfully wide. Maybe its the type of plugs you are using. What brand are they?