HELP.... Carb issue

[ROMI]

I went out crusin tonight and as I pulled up to make a left at the first major road, I stalled it out.  I did this a couple of more times before I realized it wasn't my lack of driving skill that was causing it.  Something has changed since last fall.  The only thing I changed was to put the correct unsilenced black air cleaner on.  The carb is an Edelbrock 650.  Here's what's happening.  From an idle, at a stop, when I accelerate quick, I THINK it's dumping a bit too much fuel. if I kind of tap it before I go then most of the time I'm alright.  Now this works all the time, if I keep the rpms up to 1500 then I can do what ever I like and it runs great. Everything over 1500 is just fine. What bugs me the most is that I didn't change anything except the air cleaner from a 72 version to the 71 unsilenced type. Any one got any ideas what my problem is (Chryco)?

[Bullitt-]

gum in the carb from siting? maybe floats sticking

[ROMI]

Yeah that's possible. How do you check and how do you get rid of it?

[Bullitt-]

Man your talkin to the wrong guy but you could always add some cleaner to the tank & drive the PISS out of it 

[ROMI]

I can handle that!

[Bullitt-]

Seriously before I got tooo deep into trying to fix anything I'd add some Lucas fuel treatment & put a few highway miles on it. Don't think it's a fuel pump that would show up more at high RPM, one possibility I thought of was could the new air cleaner be interfering with linkage, those do drop down lower than some.   

[Chryco Psycho]

the accelerator pumps are notorious for drying up when they sit & then not squirting fuel  the pump is available separatly without buying a complete kit , replace it & the problem will go away til next spring

[Bullitt-]

   a simple test for that is when the car is cold, been sitting for a day or so, you have to pump the accelerator a bunch to get it to fire

[ROMI]

Thanks guys.  That accelerator pump idea sounds like the issues to me.
I told my buddy every time we stopped that I knew WHO would know what was wrong (Chryco).
Thanks again Bullitt and Chryco.
Now I gotta find out where to get one. It sure would be nice to find one today at a store somewhere.

[Bullitt-]

you might try Advance. I ordered brake shoes on Sat. P/u on Sun.
http://www.partsamerica.com/ProductList.aspx?categorycode=3339Q

[ROMI]

Thanks Bullitt, I went to Edelbrock.com and found 3 dealers within 10 miles of me. Two of them were Autozone. Here's hoping they stock the pump.

[ROMI]

I got to thinking about the fact that my carb is a manual choke and realized that I don't have a cable or anything hooked up to it. I went out, took off the air cleaner and pumped the throttle by hand 3 times and each time, plenty of fuel came out.  I then started it up and started putting the choke in different positions and found that if I closed it just a little bit that it seemed to give me the same results as if I was sitting at a light feathering it waiting to take off.

I hate to appear stupid but could that be my problem instead of the accelerator pump or am I just compensating for something else being wrong? I'd say 1/8 inch travel made a big difference.

I know this doesn't seem like a big deal but when your sitting at a light trying to turn left, stalling and difficulty restarting is not my idea of cruising.

[Bullitt-]

When you close the choke you are limiting the amount of air therefore enriching the mixture. adjusting your mixture screws would correct. BUT if you have a gum buildup that will do away with some driving you will need to adjust back after the gum dissipates.

[Grancoupe]

Choke thing happened to me on a Holley 750 I had. No cable to keep the thing open and it started closing aand stalling on hard throttles.I tie strapped it open and it solved the problem. Worth a try on your end...

[Chryco Psycho]

I usually cut a piece of coathanger wire & insert it into the choke mechaism so it cannot come on
 I do this as I install the carb so I have never had that problem