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When I started her up this morning, she fired up with a few kicks of the pedal like always, but then she started running rough and eventually died. I popped the hood, and noticed fuel dripping out from the driver side throttle shaft area. Took the lid off and noticed both front venturis dripping fuel into the front 2 barrels. I took the lid off, ensured my float height is correct, and installed new needles and seats. This did not change anything. It did not want to start, and only starts with my foot to the floor. As it ran I noticed fuel pouring out of the passenger side air bleed vent. Even more fuel was dumping into the front 2 barrels after shut off.
Not really sure where to go from here besides tearing the rest of the carb down for a rebuild and clean. Which would probably solve the problem, but I wont know what exact issue was. anybody got any idea on whats going on?
Ps: I gotta go to work so I wont be back to my car until are 4pm pacific time. Will be reading and replying to the thread though
There's not much to cause the issue. Either float levels are wrong, the floats are leaking and sinking/heavy. There is trash in the needles, or fuel pressure is overcoming the needles..
There's not much to cause the issue. Either float levels are wrong, the floats are leaking and sinking/heavy. There is trash in the needles, or fuel pressure is overcoming the needles..
JIM
it is the stock mechanical fuel pump, I have a holley regulator set to 5 psi
If it's debris caught in the needle and seat you could pinch off the rubber fuel feed hose to pump and run it out of gas , debris gets caught in there and it won't let the needle shut the fuel flow off to the bowl , it's already flooded so you'll have to hold it to the floor to start it , when you run it out of gas the floats will be hanging down , release the pinched off feed hose and restart it , if it's caused by debris the new fuel pumping into the carb should wash the debris off and return things to normal ..... otherwise you a fuel pressure problem
Do you have something confirming the 5psi at the carb? Maybe your regulator took a dump.
loaned out the gauge I use to measure fuel pressure to a buddy. I just disassembled the carb and started cleaning out the fuel passages. We’ll see what happens when its all back together. If it floods again i’ll get that gauge and check the fuel pressure
The Edelbrock carbs are copies of 60 yr old afb and avs Carter carburetors that most people turned into door stops. They. Came from the factories with no regulators then , they don't need it now. Your problem lies elsewhere.
The Edelbrock carbs are copies of 60 yr old afb and avs Carter carburetors that most people turned into door stops. They. Came from the factories with no regulators then , they don't need it now. Your problem lies elsewhere.
Wasting my time reading about how a carburetor works is pointless.. your problem isn't the pressure put out by a stock pump.
I Don't care what Edelbrock and their corporate lawyers say. They say a lot of things that aren't true, like the rpm airgap won't fit under my hood.
A regulator solved my past excessive fuel problem, so in my case it was needed.
turns out I had a sunk float. Unfortunately edlebrock is out of stock of 1406 floats. And no parts stores near me have them. Seems like they are one of those parts that the supply chain issues dried up. Bought from an aftermarket 1406 accessory company, BH motors. Probably made from chinesium but I just need them to hold long enough for the edelbrock ones to show up.
Last edited by Cmurray79; Aug 8, 2022 at 12:43 AM.
Good deal.....glad you found it. I really thought it had to be something like that.
I'd just use the aftermarket ones you got.....no need for the Edelbrock's if it works.
Trust me..someone else is making them for Edelbrock.....
JIM
Yeah I overlooked the floats for sure. Also I didnt really know the exact way the fuel runs through these carbs before this post. Once you guys chimed in and I did some reading I realized that there is nothing else in the carb that could cause my problem besides the floats or needle and seats. Replaced the needle and seats already so when I opened her up again I removed and shook a float and I heard the fule inside it.
Thanks again, this forum is the only reason Ive been able to keep my car on the road as much as it has been these first few years of ownership
Bad news. I was right about the Chineseum. These floats are horrible, and I cant get them to fit. The solder is garbage. The brass material is very thin, causing it to kink when adjusting float level. The mount is not soldered at the correct spot. The mount is not the correct length, so it does not come in contact with the needle, allowing it to hang. Really bad stuff. Avoid BH motors on amazon for your carb parts.
I mean cmon… Mount in wrong location Thin walls kinking
try and find the leak on the original and solder it up if you can , at this point nothing to lose if it doesn't work
I am going to try this. Ive never soldered anything, but it cant hurt to try. I’ll use the junk floats as practice. I ordered some official edelbrock floats off ebay, but they wont be here for a week.
Wow...those are terrible! Can't imagine bending the float just by adjusting float.
I stand corrected on aftermarket....but IF you find decent one's they'd be fine. But I think you had Edelbrock one's ordered too?
JIM
I did but they are still out of stock and possibly a month out. My vette is my daily so I want to fix it asap. I have another car but its a garage queen cadillac that I dont like putting lots of miles on.
You do with the edelbrock carb... or at least I did. I just had to replace my pump least week with a auto store delphi replacement speced for my car and I had to tweak the pressure once again to my holly since it was reading 9. The edelbrock carb I used to have did not like anything over 5 pressure wise.
Edelbrock 1406 Flooding
