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I’ll work on adjusting and see if it helps any. I had the next size accelerator pump nozzle in and still had the issue, that’s why I went back to stock to start over. And yes, it’s a double pumper. But I do have a high stall and 3.70 gears. I have a mechanical secondaries 600cfm edelbrock that...

Definitely getting fuel out of the accelerator pump. Considering replacing it just to ensure that it’s working correctly. I’ve got the pink cam in position 2 for a 900-1000rpm range. Adjusting the pump lever never seems to match Holleys advice. If I limit lash as throttle just moves, at wide...

Been awhile with not much progress. Busy with work and kids. Long story short, got the carb back to stock. 6.5 power valve, correct jets, accelerator pump nozzles, etc. leaning towards the accelerator pump circuit. Any semi-quick throttle off idle or anywhere under 2000rpm and engine falls on...

Thanks again for all the input. Think my next step is to put the Holley back to stock and go from there. I think the advance stop bushing I have installed is the blue one. So that gives me around 36 degrees all in by around 3250 rpm according to the msd chart and my initial advance. I really...

Posting via your phone is not the easiest. The two videos before are in park, no load. But these issues I’m about to talk about are worse on the road. Might be hard to tell or see/hear, but there is off idle stumble--you can see it in both the videos giving light throttle to go from 1000-2000...

Alright guys, today was pull some info day. I didn’t test anything, but you’ll obviously see I was testing in the past. This info is how the car sits today. Plugs were all pulled before I started the car up today so it’s what they looked like last time I ran the car. Let’s just say it’s not...

First off thanks for all the advice, everyone. I'll try and get as much info as I can this weekend sometime. Kids and work interfere quite a bit. Starting to lean towards a fuel delivery issue. The holley I have is a 750 double pumper 4779C. Memory fades why I bought that size. I did have a...

Thanks for the reply! Pretty sure at one point I tried every single combination on that MSD timing curve. I'd have to double check what I'm currently at. The engine really liked a lot of initial timing with all of it in as fast as possible. Even made a custom bushing at one point for a test...

Hi guys, new to the forum so let's see how this goes. Looking for some opinions/advice. I have a 73 mustang coupe with a 351c that I rebuilt fully about 10 years or so ago on a college student budget--which wasn't much. Since then I haven't even put 3000 miles on the car because it doesn't run...