Edelbrock 1406 - Needle & Seat - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**LostMy65** · 04-06-2020, 11:38 AM

I'm really, really sure the carb is fine.
It's fairly new, and it was running fine.
But it's started running rough.
I noticed fuel coming out at the lowest linkage and searching forums, I deduced that a debris isn't allowing the needle to seat, and so fuel keeps pumping into the bowl.
Anyway, can I just open the carb up and blow things out and not actually rebuild it?

geezer#99 · 04-06-2020, 12:06 PM

Sure you can.
After you lift the lid the floats will drop and then you can blow out anything in the seats.
Thee are two needle/seats by the way.
Just use light air pressure.

You gotta pull the metering rods out too.

68 P.O.S. · 04-06-2020, 03:19 PM

The needle and seats also have a little filter screen in them that you'll want to blow out to make sure nothing is trapped in them as well. Make sure you set the float levels to Edelbrock specs also. Edelbrock carbs also need a fuel pressure regulator set to 5.5 psi, or else fuel gets pushed past the needle and seats and floods.

**LostMy65** · 04-06-2020, 04:11 PM

Quote:

Originally Posted by 68 P.O.S.

The needle and seats also have a little filter screen in them that you'll want to blow out to make sure nothing is trapped in them as well. Make sure you set the float levels to Edelbrock specs also. Edelbrock carbs also need a fuel pressure regulator set to 5.5 psi, or else fuel gets pushed past the needle and seats and floods.

Thanks guys.

Yes, I have a regulator to keep the pressure under 6. I also use that heat insulating spacer.

I'll post back about how it goes.

Dead Parrot · 04-06-2020, 10:32 PM

2nd the check float levels thought. They are often wrong out of the box.

You may want to get a new top gasket in case the existing one gets damaged during the clean out attempt. Having a spare often acts to protect the old one.

toolboxchev · 04-09-2020, 01:43 AM

I pulled the top of mine about a year ago. Could not believe the amount of debris that made it past 2 fuel filters.

Cleaned it out and it was not the problem. My HEI coil was bad.

Glad however to have taken the time to do all that work though, I will be doing a thorough cleaning in the near future.

04-06-2020, 11:38 AM	#1
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,460	Edelbrock 1406 - Needle & Seat I'm really, really sure the carb is fine. It's fairly new, and it was running fine. But it's started running rough. I noticed fuel coming out at the lowest linkage and searching forums, I deduced that a debris isn't allowing the needle to seat, and so fuel keeps pumping into the bowl. Anyway, can I just open the carb up and blow things out and not actually rebuild it? __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

04-06-2020, 12:06 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,510	Re: Edelbrock 1406 - Needle & Seat Sure you can. After you lift the lid the floats will drop and then you can blow out anything in the seats. Thee are two needle/seats by the way. Just use light air pressure. You gotta pull the metering rods out too.

04-06-2020, 03:19 PM	#3
68 P.O.S. Registered User Join Date: Jan 2007 Location: Puyallup, WA Posts: 1,661	Re: Edelbrock 1406 - Needle & Seat The needle and seats also have a little filter screen in them that you'll want to blow out to make sure nothing is trapped in them as well. Make sure you set the float levels to Edelbrock specs also. Edelbrock carbs also need a fuel pressure regulator set to 5.5 psi, or else fuel gets pushed past the needle and seats and floods. __________________ 72 C10 lwb fleetside -stock 350/350 combo

04-06-2020, 10:32 PM	#5
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,472	Re: Edelbrock 1406 - Needle & Seat 2nd the check float levels thought. They are often wrong out of the box. You may want to get a new top gasket in case the existing one gets damaged during the clean out attempt. Having a spare often acts to protect the old one.

04-09-2020, 01:43 AM	#6
toolboxchev Registered User Join Date: Jul 2015 Location: 2nd left past the stump on a dirt road. Posts: 2,629	Re: Edelbrock 1406 - Needle & Seat I pulled the top of mine about a year ago. Could not believe the amount of debris that made it past 2 fuel filters. Cleaned it out and it was not the problem. My HEI coil was bad. Glad however to have taken the time to do all that work though, I will be doing a thorough cleaning in the near future.



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