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Need some help from a mechanic

lilchi721

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I have a 78 ford, crewcab, 351m400. Edelbrock intake and just installed a brand new 750cfm edelbrock carb. Started right up and ran as good as it ever has for about 10 min. Went to adjust the feul lean one side, flooded out died. It should be noted that i had flooding issues with the last 650 ctm carb, and was told it was old and needed to be replaced. I have adjusted the floats, added an electronic fuel pump, and a new regulator(set to 5.5 psi). I have done everything aside from swapping out springs and needles. Wait for a while, fire it up, runs beautifully until flooding out. Any help will be appreciated.

Fuck everyone who has a joke, not in the mood, i hate you.

Thank you to anyone who wants to help.
 

moxie

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Ew. Get me out of this thread. Gross!

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Harry Seaword

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Did you check for a vacuum leak at the slave cylinder?
Float's gotta be stuck. Get a rebuild kit and do it again.

Ethanol destroys those little things in no time.


Edit...AND check the little rubber plugs on the back of the carb for the lines not being used. I had one that cracked and was sucking air. It'll make it run instantly bad like yours did. It's a 10 cent fix and very common.

I don't work on anything that old but I gotta agree with Juicy on this one.
 

Bayou Tiger

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Did you check for a vacuum leak at the slave cylinder?

That's what I think the problem is, a vacuum issue. The engine runs for 10 mins ? If true, then it would have flooded out long before 10 mins if floats were an issue.

To be honest, it doesn't sound to me like the carburetor was ever the problem to begin with.

If the points are good and the distributor cap and rotor is not damaged, then its a vacuum problem.
 

JuiceTheGator

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When I first got the Wagoneer, it would run like a top for about 10 minutes and then go to shit. Turned out it was the coil wouldn't work right after it got hot. The guy before me had put an MSD ignition on it and I think the pull was too much for the shitty coil.

That and the little rubber thing falling off the back of the carb were my only two issues with that beast...should've kept it.
 

Bayou Tiger

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DSC_0256.jpg




Follow the lines from carb back to Vacuum canister (dashed line). Sounds like you may be losing vacuum pressure.
 

Tomhusker

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I used to rebuild carbs for pocket money when I was in tech school. I still think that the problem is in the float bowl. Either the needle valve is not seating properly or your float is not set properly (which would cause the needle valve to not seat properly.)
Sometimes, when working with the float, the oil from your skin can cause the float to lose buoyancy. This is not an issue if it is a brass float. You should, at best, wear rubber gloves when working on a carb. At least, wash your hands to remove dirt and oil before handling the float.
Or, if it's brass, your float could have a hole in it.

I've been wrong before, but this is where I would focus my attention.
 
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