[fastbck65]

Here's the scoop: I installed a 4V carb and intake on my 302. The intake is a stock 4bbl intake from a 289, the trouble is I have a Carter AFB carb from a '69 GM car. Everything works great and all. The trouble is I have a flooding issue. Is there anything I need to do besides adjust the floats? I pulled the air horn and the floats are in spec. The carb was jetted for a 283 chevy before it was mine so I don't think that's a problem either and I'm using the stock fuel pump.

It ran great for about 20 minutes and I tuned the idle and mix. Then I shut her down. A few minutes later I tried to start and it wouldn't fire up. I smelled raw gas and pulled a plug and it was wet with gas. So I put the pedal to the floor and it hit a couple of times and tried to fire but it never did. Any input about this?

[sillas]

Not sure, but, Did you check floats?

[fastbck65]

Yep! Floats checked out and they are in spec. What else causes gas overload?

[The Greek]

If the floats are in spec then the only thing else that would cause the flooding is what is attached to the floats, the needle and seat assy. The floats control the needle and seat and if they don't shut the fuel completely you will have your flooding issue. They may be the type that are all metal and trash is under the needle or they may be the Viton tipped type that may have deterioriated. How much fuel pressure do you have? The max. pressure should be about 7psi. The jetting should be about right for your engine if it was correct on the Chevy 283. All the best,-Chuck

[fastbck65]

Thanks for the info! The tips are viton and the carb was rebuilt about 15 years ago. The carb has sat in a garage all that time. I guess another rebuild is in order.

If I blow in the fuel inlet and activate the floats they do cut off flow. Maybe one of the floats is leaking around the seam and sinking in the bowl?

I have the stock mechanical fuel pump. Pressure isn't over 7psi. If I have any problems after the rebuild, I'll post again and troubleshoot.

[Doc]

I am going to preface this post with "I absolutely LOVE AFB carbs!!!!"

Float level is right, it fired once and was tuneable, now it is loaded up and won't start......

Hmmm, let's examine somethign you said. You said the carb has been sitting for 15 years and was rebuilt way back then......hmmmmm.

I doubt seriously the float is sinking, but it certainly can't hurt to check it out. I doubt the carb is jetted too big. I am willing to bet that the needle has deteriorated as was stated above. The bowl is most likely full of varnish too. A good rebuild is in order here.....

Don't discount the idea that the stock pump can't put out more tha 7PSI. I have seen stock replace,ents that were.......hyper....for lack of a better term. I have seen as high as 12psi out of a factory replacement pump. CHECK YOUR FUEL PRESSURE!!!!

Edelbrock has bought the carter carb line so you will need to contact them for a rebuild kit. Set the needles and jets in the kit aside. Make sure you ask them if the kit includes a VITON needle. Replace all the gaskets, and treat the rebuild like brain surgery! Keep the sucker eat off of clean inside as you reassemble it.

I love AFB carbs for simplicity. I love them for tuneability. I have run them for years, and will continue to run them in the edelbrock form factor.

Oh, pull the plugs out and let the engine air out a bit. Put htem back in and before firing the thing up again for the first time (before rebuilding that carb), turn the idle mix screws in and back them out 1 turn. it will be a tiny bit lean, but it shoudl start.

Good luck and pm me with any questions you have.....

Doc

[fastbck65]

OK Did the rebuild and reset choke floats. Now there isn't any fuel pouring in the idle circuit like there was. Problem is FIXED!! Thanks to everyone for the insights!!

It idles like a champ and you can tell she wants to go out and open up!!!

When I get the resto completed I think I'll see just how much she likes it!!

[The Greek]

Glad to be of service--------Chuck