Do you remember the fix having to do with adding a second fuel supply line on the driver side of the AVS

MikeE, to me it just sounds like the float level is set just a little too high. The fuel difference between the low or lower than the site hole and the restart level is what is surging into the engine and stalling it. IMO.

If you did deliberately set the float level to the "just trickling out the site hole" and that’s where it is when you start the engine then I would think the floats are okay. We’ve had floats that have developed a leak (hollow floats) and they become less buoyant and during hard deceleration or a bump coming into a corner will open the float valve and let it a surge of fuel that stalls the engine. Do the floats have the weight on them so you can weigh them to see if they are okay?

If the floats are bad or the float valve is bad then they would not shut the fuel off and when you started the engine and the fuel pressure increased the fact that it didn’t come gushing out the site hole tell me they are okay. I still think the symptoms indicate too high of a float level setting. Does hard forward braking surge the fuel toward the venturies or a path toward the intake manifold? Is there a baffle system to stop this surge or does it rely on the float level setting? Just throwing things out there...


MikeR

MikeE,you may want to try lowering the float level in the center carb.You may not have noticed but the sight plug sits approximatly 1/4" higher on the center bowl.If you adjust so fuel just trickles with sight plug removed as recommended,the center carb will have a higher fuel level that the ends.

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Do you remember the fix having to do with adding a second fuel supply line on the driver side of the AVS


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No second fuel supply.If I remember it had something to do with the booster nozzle modification.May take a while but I'll find it..

Hey Mike, Just a thought...Reach cruising speed and shift to neutral. While coasting, raise the RPM with the gas pedal to say around 2500-3000. Stop in the same manner that duplicates the stalling event, and see if it stalls. If it doesn't, then it is possible that the fuel pump is not providing enough volume at lower RPM levels. Another thing I remember (back in the day) is having a car that stalled when coming to a stop. It had a bad fuel line (hose) before the pump...It actually sucked air rather than leak fuel! The nature of the hole (a crack actually) acted like a valve allowing air in but no fuel out. At lower RPMs the pump suction could not over come the leak in the hose and the carb was starved...It kicked my butt for about a week before I pinned it down...Strange but true! Good luck!

P.S. I'm sure the latter doesn't apply to you, just thought of it while I was typing!

I lowered the float level in my AVS to 7/16 which is the Edelbrock spec,(FSM spec is 7/32) and no more stalling under hard braking or fast level left turns but I get some hesitation on fast uphill lefts. Should I raise the driver side or pass side float a little? Now I understand why Holly has externally adj floats.

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I have same problem with my AVS 4bbl on 440 Charger, but it will also stall on hard left turns but hard right turns are no problem. (this is with foot off gas pedal). Setting float level low seems to help but no solve the problem.



There is a fix for that in the old Tech Bullitens.If I can find it I'll post it.

62maxwgn did you ever find that Tech Bulliten?