Flooded Carb on 90 OBS 454ss

[toocoo]

Hey guys,

I have another issue that i ran into this weekend that i need help with. i was changing out the fuel pump and strainer on my 454ss this weekend and ran into an issue.

all i did was remove the bed and removed the fuel send unit and replaced the pump.

i re-assembled everything and went to turn on the truck and it fired right up.

a few seconds later the truck died as if it ran out of fuel...so i turn the ignition and and it wont turn over as if it isnt getting fuel...

so i give it a few pumps on the accelerator and it fires up but dies out a few seconds later. I notice this time gas coming from the exhuast and a heavy fuel smell

I open the hood and remove the air cleaner and my carb is completely flooded with gas. and gas is pouring out of the 2 small stacks seen in the attached picture.

it stopped oneced i turned the ignition off and shut off the fuel pump.

but it started to flood once i turned the ignition on and the pump activated again.

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Im a total noob when it comes to carbed vehicles...i purchased this truck with the carb already in it.

any help that you guys can give me would be greatly appreciated.

Thanks!

 

[Joesgarage]

What type of regulator do you run?
Did you take out a low pressure pump and install a high pressure pump?
I don't think that pieces of dirt would have gotton in BOTH sides of the carb at the same time.
you did say that fuel was coming out both vents.
Steve

 

[DRAGGIN95]

Yeah I was wondering the same thing's, did you put in a higher pressure pump, and are you running an outboard rgulator up near the carb?

 

[toocoo]

fuel was coming out of both vents...

i replaced the pump that was in the tank (which looked like a regualar OEM pump) with another OEM pump i bought from the part store. I'll have to check the type of fuel regulator i have but if i remember correctly it was a Mallory.

Looks like this one.

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[Fobroader]

Carburettors......easy to fix, put shotgun in mouth, pull trigger, look down and laugh maniacally as the next sucker tries to resolve the problem

 

[FastOrange]

check your float levels, sounds like they are too high, that will make gas pour out of the vents.

also, your regulator could have ****** up, and there is too much pressure and its overpowering the needle and seats in the card.

 

[DRAGGIN95]

your regulator could have ****** up, and there is too much pressure and its overpowering the needle and seats in the card.[/QUOTE] This is what I was thinking.

 

[FastOrange]

This is what I was thinking.

that would be first thing i would look at.

 

[Tempted]

Make certain that the pump is low pressure. Check your fuel pressure before anything else. A TBI pump looks exactly like any high pressure pump.

The not turning over thing is called hydrolock. Very bad. Once you get it all figured out, change your oil immediately.

 

[toocoo]

I had a mechanic from accross the street come over last night at take a look at the issue. He tells me that i need to get a higher PSI fuel pump at least 30psi. I havent gotten a chance to talk to him yet but does that sound right? to me i would figure that more pressure would cause more fuel to be pushed out?

again total retard when it comes to carbs