82 dodge d150. Slant six with Holley 2300 2 barrel, Aussie speed headers, hei upgrade. My issue is that when I slowly accelerate it reaches a point where rpms drastically cut out and engine wants to die. Short jabs on the throttle are responsive with no hesitation or bog. Carb is new. When looking through float bowl sight window during slow acceleration, fuel level remains as it should. What may cause this? Thanks

Try disconnecting the vacuum advance hose from the distributer. If that cures the problem, replace the pickup in the distributer.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Should there be a change in rpm when disconnecting/reconnecting vacuum advance pod?

I disconnected the vacuum advance and plugged the line and noticed no rpm change when doing so. I thought it strange so I reconnected and there was still no change. Should there be at idle? I will be disconnecting and driving later when it warms up outside.

I mean, disconnect the vacuum line and drive the car. See if it still cuts out. I have seen bad electrical connection at the distributer pickup coil. When the vac advance moves the coil mounting plate to a certain position, the circuit will open, causing the engine to die. But only at one particular point.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

No change. However, I found small crack in the rubber fuel line going to carb that was covered by a clamp. Didn’t think it was the issue but cut bad section out anyway and reconnected. What is strange is that after doing so my float level was all the way up in the sight hole. Adjusted back to halfway per Holley. Now I can see that as I gradually accelerate the engine the fuel bowl empties. After letting off accelerator the bowl will slowly fill back up. I’m thinking I need to chase down a blockage somewhere. With fuel line removed at carb, healthy spurts of fuel come out while turning the engine over. Would this indicate a blockage within the carb?

- Do you have a gas filter before the carb? replaced when?
- Carb rebuild kits have a float valve replacements. Is that valve in your carb replaced?

I don't know in normal operation, but maybe level can come down some, and also the pressure inside the bowl may get lower during engine load, that would help gasoline to flow in.

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/6 Dodge Charger 69
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Spurts of fuel don;t really mean anything. Crank the engine for 30 seconds, and let the fuel into a container. There is a "spec", but I don't know what it is, offhand. This will check volume. Best way to check pressure, is to "T" in a pressure gauge, and measure while engine is running.
PS: Volume should be 1 qt in 1 minute, or 1 pint in 30 sec.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Which size 2300 Holley 2BBL ? (350 or 500 cfm?)
On a SL6, the bigger 500 cfm version can be hard to transition from main feed into the power circuit and that can cause a large "flat spot" as you give the engine more throttle.
With the engine hot and at idle, what happens when you floor the gas and hold it? does the engine stall completely or hesitate then go?
Once the engine takes full throttle does it increases RPM cleanly to "red Line", if held at WOT ??
DD

Good news, I collected myself and went back to the basics. Broke out vacuum gauge, timing light, and multimeter and started over. Found that my idle circuit was in a rich condition, and curb idle was too low. Reset and verified timing at 10 BTDC. Then proceeded to lean out idle circuit. This cured the gradual acceleration but created a situation where the engine would die immediately following a quick throttle stab. Raised curb idle and this new situation was cured. Continued fine tuning once I was sure I was on the right path. Truck is now driveable at all throttle positions. My new concern is that I believe my vacuum advance pod is doing nothing. I switched my distributor vacuum line to fill manifold to see if rpm changed, which it did not. Should there be a rpm change when doing this? I understand that when hooked to ported source no change will be noticed at idle but I would think that it should show a change when hooked to full manifold vacuum. Am I correct in my line of thinking? Thank you all for your help.

You are correct

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225