Carburetor problems
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Carburetor problems
I have a 74 f250 w/390. I just put a edelbrock 600 on it and it is giving me fits. It will start up ok but if I drive it anywhere and shut it off and let it set for 15 to 20 minutes, you have to pump the hell out of it to get it to start and blows white and black smoke like it is flooded or something. But if I drive it and shut it off and start it within 5 or so minutes, it starts right up.. Anyone have any ideas?
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I haven't smelled the tail pipe for gas smell yet, and no I haven't messed with anything else. On a cold start, it starts fine. It is only hard to start after it has been running a while and it sits for 15 20 minutes. I did read where these edelbrocks have a hard time starting because of the gas boiling in the bowl from the heat of the engine. Edelbrock has a gasket or something for this reason. I will have to check and see if mine has it .
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I haven't smelled the tail pipe for gas smell yet, and no I haven't messed with anything else. On a cold start, it starts fine. It is only hard to start after it has been running a while and it sits for 15 20 minutes. I did read where these edelbrocks have a hard time starting because of the gas boiling in the bowl from the heat of the engine. Edelbrock has a gasket or something for this reason. I will have to check and see if mine has it .
Lead Driver
Joined: Oct 2018
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The best idea is to throw it away and put a Holley 4160 on it.
If you don't like that spend a day trying to adjust the float level and put an insulating spacer under it . then throw it away and put a 4160 on it.
If you don't like that spend a day trying to adjust the float level and put an insulating spacer under it . then throw it away and put a 4160 on it.
Lead Driver
Joined: Nov 2006
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From: Pa.
Oh boy here we go 
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No smell of gas at the tailpipe and I don't have the spacer. After driving it about 40 miles today, when I got home and shut it off. I popped the hood and I could hear a noise in the carburetor like the the gas was boiling inside.
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Lead Driver
Joined: Nov 2006
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From: Pa.
Can you post pics of your setup without the air cleaner to include both the back and front of the intake? Also what temps are you running at? and what type of gasket ate you running between the carb and intaj=ke? and how thick is it approx. ?
Grumpy goat
Joined: May 2017
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Yep, here we go.
If you go with a 4160, I very strongly suggest not getting the cheaper version. It does not have a serviceable secondary metering block (you can't re-jet the rear two barrels). And it does not have "center hung" float bowls. They're side hung, and a pain in the butt. You can ID this carburetor by the external fuel line that goes from front to rear on the throttle lever side of the carburetor. A 4150 style Holley has center hung floats, separate fuel supply lines for each float bowl, and a serviceable secondary metering block. I like that carburetor.
If you have to have an Edelbrock, I suggest you get away from the Performer model, and get an AVS2. I've got two of them and I'm very impressed with them. Easy to tune, and the annular discharge primaries make it fell like fuel injection. Seamless transition between circuits.
And for your own sake, consider getting an air/fuel ratio gauge and a vacuum gauge. You'll never again have to guess and blindly stab at carburetor tuning.
If you go with a 4160, I very strongly suggest not getting the cheaper version. It does not have a serviceable secondary metering block (you can't re-jet the rear two barrels). And it does not have "center hung" float bowls. They're side hung, and a pain in the butt. You can ID this carburetor by the external fuel line that goes from front to rear on the throttle lever side of the carburetor. A 4150 style Holley has center hung floats, separate fuel supply lines for each float bowl, and a serviceable secondary metering block. I like that carburetor.
If you have to have an Edelbrock, I suggest you get away from the Performer model, and get an AVS2. I've got two of them and I'm very impressed with them. Easy to tune, and the annular discharge primaries make it fell like fuel injection. Seamless transition between circuits.
And for your own sake, consider getting an air/fuel ratio gauge and a vacuum gauge. You'll never again have to guess and blindly stab at carburetor tuning.
Lead Driver
Joined: Nov 2006
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From: Pa.
@ Mike
X2 Money well spent and edlebrock does make a good one of those. You'll need to add a couple of Oxygen sensor bungs to your exhaust as well. 
And for your own sake, consider getting an air/fuel ratio gauge and a vacuum gauge. You'll never again have to guess and blindly stab at carburetor tuning.
Logistics Pro
Joined: Jun 2018
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I have a 74 f250 w/390. I just put a edelbrock 600 on it and it is giving me fits. It will start up ok but if I drive it anywhere and shut it off and let it set for 15 to 20 minutes, you have to pump the hell out of it to get it to start and blows white and black smoke like it is flooded or something. But if I drive it and shut it off and start it within 5 or so minutes, it starts right up.. Anyone have any ideas?
Lead Driver
Joined: Oct 2018
Posts: 7,892
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The Edelbrock is just a reproduction Carter AFB , and Carter went broke so go figure. but just like VW bugs some people like them so they keep making them.
Has this carb worked on this engine until now or is it a new or used install you're working on ?
Has this carb worked on this engine until now or is it a new or used install you're working on ?