DCOE 40 Flooding

[theleisure]

This weeks new problem features my DCOE 40 carburetor. I took my Sprite to NAMGAR's car show Friday and was treated to an extremely rich mixture and flooding on the way home. I have a Carter P4070 pump that's designed to pump at 4lbs. That should be and has been perfect for my needs. Something's going on and I need some help. I know to check the pressure and I'm going to buy and install an inline gauge tomorrow after work. After that, I'm at a loss. Any advice would be appreciated.

Can't seem to get pages 32-100 of Pat Braden's "Weber Carburetors" to come up on google book preview. Of course not, it's the troubleshooting and repair section...

I look forward to your advice.

 

[RonMacPherson]

Might go here for initial visit;

https://www.teglerizer.com/

 

[theleisure]

Thanks Ron. It was nice to read carb specific info. Unfortunately, I didn't see a troubleshooting section anywhere.

None of the shops in town have an inline fuel pressure regulator. This island is really disappointing sometimes. I'm going to order the Braden book and the Haynes manual later tonight.

 

[RonMacPherson]

Jegs or Summit, you can order online and get the good Holley one....

 

[RonMacPherson]

Just googled "diagnosing Weber carburetor problems".. This is the first entry... Plenty there so enjoy research...

https://www.webercarbsdirect.com/v/vspfiles/images/Weber%20Trouble%20Shooting%20Guide.pdf

 

[theleisure]

Update:

It turns out that my fuel pump is putting out too much fuel pressure. That is good in the sense that I don't have to tear into my carb but bad because I just installed this pump last Fall. It's a Carter p4070, a pump that I thought was the best available and supposedly always pumped the right pressure for a weber-- 3.5 to 4lbs. Dang. Anybody else ever have this problem with their carter p4070? When the pressure is too high it makes a different noise, almost like it's stumbling instead of nice and smooth.

I'm heading to napa to buy another pump tomorrow, any recommendations?

 

[Gundy]

I use an in-line adjustable regulator on my Land Cruiser
with a 38DGAS Weber because I also use an electric fuel pump.
Works great. Different animal but same problem, excessive fuel
pressure for a Weber.