I am hoping someone who reads this can help provide some ideas or direction I can go in getting my berly back home. Long story short....took it in and had my original 305 V8 engine rebuilt from the block up. Had the E4ME 4bbl carburetor completely gone through at the same time. It is computerized with my berly. Everything is put back together, but now can't figure out why the carb wants to stall out when you have your foot on the brake pedal at a stop sign or stop light. It idles fine 680 rpms and it doesn't die when your at idle (in park) or driving it. Only when your in gear trying to go from a deadstop or slow crawl or when you have it in park and just try to rev the engine, it hesitates than it either engages and revs up and gets out of it, or chokes at about 240 rpm and either comes back to idle speed if you let off the gas and just give it some time or just dies.
Its unsafe to drive in its current operating condition for obvious reasons. Is there anyone who is familiar with these carbs (computerized, non-TPI, EFI) 4bbl carbojet? Here's what I got so far for answers:
1. Is the fuel filter the right way?
2. check cat. converter. If its partially plugged that could cause the hestitation
3. check alternator - bad alternator could be the cause
4. float - is it set right?
5. idle solenoid and correct operation on primary metering rods
6. idle speed is set correctly? - I believe so since it does idle nicely at 680 rpm
7. make sure vacuum connections are good - should be with a rebuilt job
8. accelerator pump installed corectly?
9. distributor not set correctly could cause the computer not to know where 0 is.
10. secondary air valve set correctly?
11. brake booster may have gone bad?

Or should I just junk the Q-jet for a modification like an Edelbrock or Holley? This car is original in all respects. It's not necessarily made for speed so I'm not interested in modifying it just getting it to be a solid runner. Sorry this is so long....any expert advise on what you think is wrong would help me get my car back.

95% of the carb problems I run across are TIMING related.

Does it do this cold, warmed up, or both?

You can disconnect and cap the vacuum line to the brake booster and see if it still hesitates. Just be careful, you'll still have brakes just a lot more effort will be required.

Make sure you're getting proper advance with your timing. A timing light with everything hooked up should show the timing mark around 20 degrees and advancing (moving counter-clockwise) as you rev it in park.

Hydro -
when it starts up, the choke is on so there really isn't any problems at this point. It when you take the choke off from the acc pedal to get it down to idle speed that I experience the hesitation.
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naf -
checked the brake booster. Everything is ok there. We did see the needle not set quite right so that was adjusted. It now doesn't die on me, but there is still that hestitation. Would not having the air pump hooked up be a potential source too? Also, the timing was set by somone else so we do this is the problem. Thanks FAST355 since this was brought up right away.