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Old 06-21-2013, 08:21 AM
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Edelbrock 1406 flooding

This is your basic 350/350 streetrod that was built in the late 90s and has been driven 40,000+ with this set up.

Red Holley fuel pump and a 1406 Edelbrock carb.

I got the car a few weeks ago.

I suspect it wasnt driven a lot in the last couple of years.

Ran fine for awhile but when it started running really bad finally saw that the passenger side carb nozzle is dripping gas as it idles.

This does not drip with engine off and fuel pump clicking away.

Only when running.

Ive put 2 differant carb/fuel injection treatment products in the half tank of gas and run it twice a day.

Running while rapping the inlet area with a wood hammer handle.

Any advice??

Rather not rebuild, open or replace....

Retired and money is short!
Thanks
Craig

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Old 06-21-2013, 08:55 AM
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Your gonna have to open it up. The floats need to be set and or there is varnish , dirt and grime in the bowls and jets. The only cash it will cost you is a can of Carb cleaner to spray it out with. Luckily, these are extremely simple carbs. Be careful and gentle when taking the upper section off as not to tear the gasket.

Here is a link to help you set up the floats..
http://www.edelbrock.com/automotive_...ers_manual.pdf

Floats need to be set at 7/16" closed and 15/16" to 1" drop(open).

Also, while your at it you should change the fuel filter.

Chris
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Old 06-21-2013, 09:08 AM
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I ordered a basic gasket kit off EBAY yesterday just in case I have to open it.

At least it can be done without removing the carb...LOL

I will hope the chemicals can cure it.... start twice a day for a week and rap the area...

I had this same issue on another rod in 1999... and it finally cured itself and ran fine tilll I traded it for this one...

After some research it seems the Holley pump has just a tad more PSI than this carb likes... but it was fine untill recently so I dont want to make major changes for sure!
Craig
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Old 06-22-2013, 06:25 AM
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Its very easy to remove the top of the Edelbrock with it mounted on the car. You just pull the cotter pins out of the linkage and remove the Torx screws that hold the top on. With the top removed you can set the floats, clean the float bowls, and check the rods and jets that are installed.

When my Edelbrock was dribbling fuel on one side I pulled the top and found I had pulled a shard of RTV from a thermostat change into the venturi. I was getting fuel on that side but not enough air. Learned my lesson about installing the air cleaner when tuning, to keep junk from being sucked into the carb.

Edelbrocks are also sensitive to fuel pressure, and it shouldn't be more than about 5 psi. It is possible that the Holley fuel pump is haywire and the fuel pressure is too high.

Bruce
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Old 06-22-2013, 07:43 AM
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Regardless of what the Edelbrock IB says(max, 6#), if you are running that carb with fuel pressure beyond 4-5 psig, it will flood. That red pump will push at least 7psig and possibly more. This calls for a fuel pressure regulator to be installed between the fuel pump and that carb

As far as pulling the carb to check things out, you don't have to. A few screws and a couple pieces of linkage and off comes the top and you then have access to everything but the throttle plates. Additionally, these Edelbrocks are very susceptible to any dirt. If you see any at all in the float bowl, that carb will not perform correctly - you need a good fuel filter.
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Old 06-22-2013, 02:03 PM
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If ya got a kit coming, pull it off, disassemble, soak in carb cleaner overnite and rebuild it.
Then ya know it's done right.
Lotsa crap will build up when any carb sit for extended period of time.
And put the hammer back in the tool box.
Do it the right way or don't do it @ all.
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Old 06-22-2013, 09:46 PM
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Quote:
Originally Posted by Irelands child View Post
Regardless of what the Edelbrock IB says(max, 6#), if you are running that carb with fuel pressure beyond 4-5 psig, it will flood. That red pump will push at least 7psig and possibly more. This calls for a fuel pressure regulator to be installed between the fuel pump and that carb

As far as pulling the carb to check things out, you don't have to. A few screws and a couple pieces of linkage and off comes the top and you then have access to everything but the throttle plates. Additionally, these Edelbrocks are very susceptible to any dirt. If you see any at all in the float bowl, that carb will not perform correctly - you need a good fuel filter.
Times 2.........
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Old 06-24-2013, 10:44 AM
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Thanks for all the advice.

Recieved gaskets in mail last night and have a needle and seat pair on way.

Hammer... Had same issue on same type carb in 1999... same situation: garage rescue hotrod... flooded worse than this and rubber hammer "Cured" it... so I was hoping for another miricle...LOL

Will open it, clean and set floats next weekend...

Yesterday the home AC decided to stop working.. so that crisis was top priority... wives... whatcha gonna do?
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Old 07-04-2013, 12:01 PM
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Installed new needle and seat set...

turned on elec fuel pump and still a dribble of gas on the passenger side.. didnt even start it up.

Have a regulator and fittings on the way from Summit....

Hope that cures it!
Craig
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