edelbrock carb
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From: Laramie United States
edelbrock carb
I just replaced the stock fuel pump on my 360 and when I started it up it ran very rough and it was smoking alot. The crazy thing is it was running fine the night before. When I looked at the carb after running it there was fuel pouring out of just about everywhere. This is the second one I have had this happen to. Please help! I am moving in five days. I need to use it.
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From: Oregon
edelbrock carb
Did you replace your stock fuel pump with another stock type fuel pump, or a high pressure pump? I ask because above 7#s can flood your carb out which sounds like the problem you are describing. If this is the case all you need to do is put in a regulator. If the only thing you changed was the pump, and you never fiddled with the carb, I would suspect that being the variable. If its a stock pressure pump, test your pump pressure (a vacuum gauge can tell you pump pressure if you don't a gauge specifically for your pressure) to make sure it pumping out what it should be. If everything checks out normal, it may just be that your pump is just pumping at full pressure where your old one was weak, and the difference is enough to flow past a bad gasket, needle, whatever in your carb. In this case pull apart your ebok and check it out...don't be to daunted by this as eboks are very simple to pull apart and inspect. I'd start with checking out the pump though. Good luck and let us know if you need more help.
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From: Laramie United States
edelbrock carb
Yes, I did replace it with a stock fuel pump. Most of the fuel is coming out of the back of the carb. The diagram says it is the fast idle cam. But I'm not sure I had this problem before. Edelbrock ended up replacing it.
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edelbrock carb
Fast idle cam?
Dude, that has nothing to do with fuel, sealing, leakage.. nothing.
Just idle speed.
If you are cracking the baseplates/ main body, you are definately doing something wrong. Lay off the He-Man heroics when torquing the carb bolts.
Regarding fuel pump pressures and AFB carbs, it's a myth. Ignore it.
It's possible something got loose when the pumps were changed and now your needle and seats are clogged.
Hard starting with a hot engine is a flooding problem.
Hard starting, cold start is a lean condition.
If the engine has a slight delay and then starts cranking the engine is over advanced, but 9 degrees shouldn't be a problem.
Josh
Dude, that has nothing to do with fuel, sealing, leakage.. nothing.
Just idle speed.
If you are cracking the baseplates/ main body, you are definately doing something wrong. Lay off the He-Man heroics when torquing the carb bolts.
Regarding fuel pump pressures and AFB carbs, it's a myth. Ignore it.
It's possible something got loose when the pumps were changed and now your needle and seats are clogged.
Hard starting with a hot engine is a flooding problem.
Hard starting, cold start is a lean condition.
If the engine has a slight delay and then starts cranking the engine is over advanced, but 9 degrees shouldn't be a problem.
Josh
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From: Oregon
edelbrock carb
>
>Regarding fuel pump pressures and AFB carbs, it's a myth.
>Ignore it.
>
Really? Hmmm, while I haven't heard of the "myth" I am well aware of the fact that ANY carb will flood out at much more than seven psi of fuel pressure. So I'm not really sure what you are talking about. But since he used a stock pressure pump, pulling apart his carb is the best bet.
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edelbrock carb
People like to claim the AFB carbs cannot take more than 4-5 PSI.
If that were really so, then why would Edelbrock and Carter manufacturer fuel pumps that crank out 6-8 PSI and require NO regulator.
People just do not understand that some AFB's (Both Carter and Edelbrock)in the 90s were manufactured with off-road needle and seats. Some carbs got them others didn't. Kind of like they installed whatever was handy.
Anyways, when such person performs a carb rebuild (which includes standard needle/ seats) they neglect the float height, which means flooded engine.
Just pay attention people, it isn't difficult to understand.
And FYI, single AFB equipped Hemi engines (1966 Coronet, 1967 'Cuda for example)had fuel pumps that put out 9 psi, unregulated.
Hmmmm...
Josh
If that were really so, then why would Edelbrock and Carter manufacturer fuel pumps that crank out 6-8 PSI and require NO regulator.
People just do not understand that some AFB's (Both Carter and Edelbrock)in the 90s were manufactured with off-road needle and seats. Some carbs got them others didn't. Kind of like they installed whatever was handy.
Anyways, when such person performs a carb rebuild (which includes standard needle/ seats) they neglect the float height, which means flooded engine.
Just pay attention people, it isn't difficult to understand.
And FYI, single AFB equipped Hemi engines (1966 Coronet, 1967 'Cuda for example)had fuel pumps that put out 9 psi, unregulated.
Hmmmm...
Josh
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Post Fiend
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From: Oregon
edelbrock carb
[updated:LAST EDITED ON 07-Dec-02 AT 06:20 PM (EST)]Its a simple mechanical fact, josh, that carbs start flooding out between 7-8 psi. Notice I said "start"...the amount is proportionate to the pressure/volume. Would it help if I said at the inlet? You see, you can have a 9psi pump that puts out only 6psi at the carb inlet due to pressure drop seen at the fuel line and fuel filter...basic fluid dynamics. Off road needles and seats have nothing to do with the fuel pressure they can sustain. There are many good books out there on carbs and fuel systems that can help you understand these dynamics better, I'd check the store here first if I were you.
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From: umatilla or
edelbrock carb
is it possible some crap got into the fuel line while they were off at the pump end and went up to the needle and seat and wedged between them not allowing it to seat properly? do u have an inline filter between pump and carb? is the screen on the carbs inlet still there and intact?
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edelbrock carb
You missed the point.
If you have off road needle/ seats and say your float height on an inverted airhorn is 7/32.
Install standard needle and seats without re-setting the height and you will have something like 3/32.
Flood city.
Maybe YOU should check out some of those books.
Smaller orfice needle and seats can sustain higher fuel pressures. Old Mopar AFB's can sometimes have size .075 seats, whereas the modern day carbs can have .110.
See a difference?
Hence a 1966 Hemi needs that 9 PSI pump, and today you need only a 6.
Josh
If you have off road needle/ seats and say your float height on an inverted airhorn is 7/32.
Install standard needle and seats without re-setting the height and you will have something like 3/32.
Flood city.
Maybe YOU should check out some of those books.
Smaller orfice needle and seats can sustain higher fuel pressures. Old Mopar AFB's can sometimes have size .075 seats, whereas the modern day carbs can have .110.
See a difference?
Hence a 1966 Hemi needs that 9 PSI pump, and today you need only a 6.
Josh
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From: Oregon
edelbrock carb
<chuckle> I thought that would wind you up, since you've been sounding a little thin skinned in some of the threads here. Anyways, yes, I knew what you meant but the way that you wrote it I didn't think that Aaron would, so I clarified that your float level doesn't affect pressure. Plus, I coudn't resist the poke. It says right with the instructions for the off-road needles and springs kit that you need to adjust the float level. Oh, and I already own just about every fuel system book out there as its one of my specialities. But if you insist I'll go back and re-read them again 
But seriously Aaron, how is it coming? Checked your gaskets, needles and seats for pitting or sediment, proper float adjustment, everything clean or is it varnished? Let us know if you need anymore help.
But seriously Aaron, how is it coming? Checked your gaskets, needles and seats for pitting or sediment, proper float adjustment, everything clean or is it varnished? Let us know if you need anymore help.
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