1969 L46 with MSD 6A (6201) ignition, Holley 80457 (600 cfm) carburetor, and Edelbrock Performer intake manifold bogs/stutters for a second when I first push in the gas to accelerate, then it catches up and goes. I noticed today that the fuel pump has fuel coming out of the weep holes, and ordered a replacement fuel pump with original specs, but am now second guessing myself. I figure I owe the car an oil change due to the possibility of fuel having gone into the oil, plus I'm pretty sure it's been awhile since the last one. I can also easily change the inline fuel filter, but my question is whether either of these are likely to fix the stutter issue, or if I should have bought an upgraded fuel pump to handle the extra CFM on the aftermarket carb (600 vs 550, if Google is telling me the truth).

 

Ensure there is absolutely no slack in the carb throttle linkage. The instant the throttle cable is moved should squirt fuel from the accelerator pump nozzles at the top of the primary bores. But yeah, you do need to do some other maintenance that you already know about.

 

my guess is carb pissers.


accelerator pump=pissers

 

Pump size has nothing to do with carb size.
The above advice about checking the squirters is a good one.....start there. Adjust the accel pump arm for no play and if that doesn't do it then go to a larger squirter.
Also.....before you do all of this....make sure your timing is set for 36 degrees total with the vac advance unplugged @ or around 3000 rpm.

Jebby

 

I would do ehat they say above. It can be a lotof things

Timing
accelerator pump not adjusted
wrong accelerator pump cam(holley) wrong hole(edelbrock)
clogged carburetor in need of a rebuild
distributor advance mechanisms seized/sticky or wrong springs giving you a slow curved
if you have a quadrajet style carb with the air flap over the secondairies, it could be just the bog associated with the door spring not being adjusted properly

Your problem can be a lean or a rich bog. If you get a lot of black smoke right as the motor kicks back in then its rich and you have too much fuel and your drowning your engine. Otherwises its too lean. If you had an AFR gauge you could see which it was. The other solution is to jump on it, let it bog then shut off you engine and look at your plugs. If they are wet then its rich, If they are white then its lean. Reading plugs is a pain but its a tool to figure out what you have going on.

WWhat speed are you going when this happens? If could be the transition circuit inside your carb is the issue and its just a bad setup. If you are trying to take off from idle or you are cruising at a fairly low RPM then it could be you idle circuit isnt set up properly. If You are cruising down the highway or back roads and just jump on it an dit just sits there and then takes off it could be the load on the motor. If you are in a 4 speed you need to down shift a gear as you start to accelerate or in an automatic your tranny needs to drop into passing gear to get the rpm up

can you give us some more details