So, I am trying to diagnose some fuel problems - carb to gassy... but Mother Mopar is not on my side, and has dealt me another problem.

The carburetor goes COMPLETELY dry overnight. This has only happened after we installed a mechanical fuel pump, after many years of an electric pump.

What are the possible causes for this? Is this carb, or fuel pump?

Bryan

carb goes completely dry or just not enough fuel to get an accel pump squirt to start it the next day?

What carb? just read another post similar for edelbrock his squirter were plugged with goo.If infact the bowl is dry its got to be going somewere most likely into engine I have a e85 modified holly that does that now need to buy billet metering blocks because someone drilled hole a bit to large.

..umm, I guess the carb info is important.

OK, these are two 1804 Eddy 500cfm AVS carbs.

As far as going dry, they go dry! We have to use a squirt bottle to put gas in the carbs to start.

Then to keep it running, we had to keep the revs up quite high before it caught and kept running, so we have a problem.

I have an old post ( eyes watering, so gassy ),
so two problems have blended into one.

Sounds like a leak to me, dry fuel bowls and gassy exhaust.

Ebrock will go dry, but I have not seen them do it over night.

I have a pair of 500cfm Carters on an Edelbrock intake on my 440. It seems to me the likely suspect if both carbs are dry would be heat. I have a four hole phenolic spacer under both of my carbs. No problems. You might try the spacers.

i'd bet the fuel is boiling. todays fuels, like oils, are not catered to the old cars. the additives to prevent the fuel from boiling are no longer in the fuel. the modern car has electric pumps with instant fuel pressure. we often install a small booster pump in the older cars to combat this problem. you could try an insulator gasket, may or may not help.get the car up to temp, remove air cleaner and shut car off. watch the fumes come out of the carb to verify problem.

Yes!!! That is exactly what happens. I thought that odd, but it has always done it.

I will look into spacers. I ran spacers on my old 3310 750 VS, and never any problem. What is good for a Holley, maybe good for an Eddy!

Bryan

Idle fuel psi/R&R needle & seat assy's (avail sep)/(as said) thick Felpro base gasket/float levels

https://board.moparts.org/ubbthreads/show...;gonew=1#UNREAD

Read this posting from over at the restoration board.