new fuel pump

You say it runs on starter fluid?  I presume you are spraying it in the venturi s?

If it were my Edelbrock carb, I'd reset the initial carb settings and see if it would start, then adjust.

If not, maybe you have junk in your carb.




|UPDATED|12/30/2013 6:05:43 PM (AZT)|/UPDATED|

i have the orig Quadra Jet carb, ran good then all of a sudden just cranks no start

Still run on starting fluid?

this site sells Quadrajet rebuild kits but also has identifying information, parts and troubleshooting tips.  Some more guys will chime in soon who know more than me.

Jim

yes i tried key on and i do not see fuel spray i am thinking the carb float is stuck?

It really sounds like a fuel delivery problem.  An engine only needs fuel, air, compression, and spark to fire and if it's running on starter fluid you've got air, spark, and compression.  If you've got fuel in the bowl of the carb, it's just not getting to the engine.  Stuck float, or clogged jets perhaps?  I would check the float, and then go straight to a carb rebuild.  But then again I'm a "ready, shoot, aim" guy.  Someone may have a more simple solution.  

is it better to rebuild or just buy a rebuilt carb? i am looking to keep it orig and stock

I'm sure that everyone has an opinion, but I'd swap it for an Edelbrock.  You can keep the Rochester to rebuild if you ever want to go back stock again.  But the Edelbrock will probably improve the car's performance and fuel mileage.  However, it's $300 to $400 for a new carb and $20 for a rebuild kit.

I'd definitely get a second opinion before dropping the money, though.

If you cannot see a fuel spray in the venturi when pumping the accelerator, try tapping on the carb with a small mallet, right at the front of the carb. If the float is stuck, that usually will knock it loose. If that does the trick, you need a new float, at the very least. Quad floats are made from a foam-like material, with an epoxy coating.Over time, they tend to absorb fuel. This usually makes them heavier, and they flood out, but sometimes, especially on cars that sit, they can swell up, and hang. If it happens to hang in the full UP position, it will not allow fuel into the car bowl.
Try the small hammer deal, and see what happens. I like to tap on the very front, center screw of the carb top, since that will normally beak the float loose, whether it is hanging down, or up.
Alternatively, you can also run a small screwdriver(or awl) down thru the vent tube to push the float down.
If it works, you will still need to rebuild the carb with the new float, and gasket kit.