Edelbrock carb problem
Thread Starter
Instructor
Joined: Oct 2006
Posts: 181
Likes: 0
From: Des moines Iowa
Edelbrock carb problem
I'm not sure if this is a timing problem or a carb problem or a combination of both. 290hp crate motor, edelbrock 600cfm. First off, after the car has ran and then sat for a few minutes you have to pump it and it still acts like it's not getting fuel after a few seconds of cranking it will start and idle fine. If you turn it off and then start it again it will fire right up with no pumping needed. If you grab the throttle arm and floor it there is a hesitation. From a dead stop if you floor the car it won't even turn the tires over but as soon as you get going and floor it, it pulls hard.???
Burning Brakes
Joined: Feb 2004
Posts: 758
Likes: 14
From: Ville de la Baie Quebec. A winner is just a loser who tried again.
I'm no expert ok,,lol but had similar problems in the past with new engine and a new edelbrock carb.
how old is the carb?
have you checked and/or disassembled the distributer, old ones can seize up and cause problems.
Timing ?? It can cause similar problems too.
Fuel pump ??,, very rare that these fail, but if you have an original gas tank/lines its probably very dirty and can cause fuel problems.
New plugs ??
Answers to these questions will help the experts on the forum to pinpoint your problem...good luck
how old is the carb?
have you checked and/or disassembled the distributer, old ones can seize up and cause problems.
Timing ?? It can cause similar problems too.
Fuel pump ??,, very rare that these fail, but if you have an original gas tank/lines its probably very dirty and can cause fuel problems.
New plugs ??
Answers to these questions will help the experts on the forum to pinpoint your problem...good luck
Thread Starter
Instructor
Joined: Oct 2006
Posts: 181
Likes: 0
From: Des moines Iowa
The carb is maybe a year old. I think the fuel pump is about that old too. The previous owner installed a new gas tank and new lines also a year old.
I did notice when trying to set my timing that the line jumped around a few degrees. Could this cause my condition?
I did notice when trying to set my timing that the line jumped around a few degrees. Could this cause my condition?
Pro
Joined: Oct 2005
Posts: 581
Likes: 0
From: Boynton Beach Florida
Check The Fuel Pressure Those Carbs Run Best At 6 Psi. More Than That They Tend To Flood..i Use A Regulator Set A At 5.5 Psi. Runs Fine..you Can Download All The Info On The Carb On Edelbrock.com
Advanced
Joined: Feb 2007
Posts: 62
Likes: 0
From: Buhl Minnesota
I'm not sure if this is a timing problem or a carb problem or a combination of both. 290hp crate motor, edelbrock 600cfm. First off, after the car has ran and then sat for a few minutes you have to pump it and it still acts like it's not getting fuel after a few seconds of cranking it will start and idle fine. If you turn it off and then start it again it will fire right up with no pumping needed. If you grab the throttle arm and floor it there is a hesitation. From a dead stop if you floor the car it won't even turn the tires over but as soon as you get going and floor it, it pulls hard.???
Burning Brakes
Joined: Feb 2004
Posts: 758
Likes: 14
From: Ville de la Baie Quebec. A winner is just a loser who tried again.
I did notice when trying to set my timing that the line jumped around a few degrees. Could this cause my condition?[/QUOTE]
Make sure the sensor on the #1 wire is as far as possible from other plug wires, you will get interferance if rubbing on another wire. I could be way off but I would tend to look distributor, wires, plugs. Are you running points ?.
Also,, as stated above, these carbs are jetted rich,, so was mine,, and the floats are usually not set to specs.
do you still have the booklet that the carb came with ?? they have easy to follow trouble shooting,, maybe you can get it on there site.
Make sure the sensor on the #1 wire is as far as possible from other plug wires, you will get interferance if rubbing on another wire. I could be way off but I would tend to look distributor, wires, plugs. Are you running points ?.
Also,, as stated above, these carbs are jetted rich,, so was mine,, and the floats are usually not set to specs.
do you still have the booklet that the carb came with ?? they have easy to follow trouble shooting,, maybe you can get it on there site.
Safety Car
Joined: Feb 2006
Posts: 4,855
Likes: 2
From: Columbia South Carolina
To check the float level you remove the top of the carb and turn it upside down, the floats should fall to about the thickness of a #2 phillips from touching the top. just use the #2 like a feeler gauge to check. Also sounds like you might want to change the position of hte rod on the accelerator pump, it is at the front of the carb on the left side. When you push the throttle down this little plunger comes up and dumps a small ammount of fuel into the carb so it has enough to get going. I believe there are three holes so three possible settings. I agree withthe other guys that the fuel sounds like it is draining out of the carb after it is shut off, that would point to the fuel pump.
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Instructor
Joined: Mar 2006
Posts: 246
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From: west melbourne florida
had the same problem.edelbrock 600 cfm carb with dual plane intake.replaced the metering rods,and springs changed the squirt,then replaced the accelerator pump. if you call the edelbrock tech line they can help. they also gave me the accelerator pump at no cost
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
as Lars put it, 90% of carb problems are ignition problems. Since you already have two threads relating to your ignition timing and distributor I'd suggest getting your distributor problems fixed first, than get your timing set correctly, and THAN evaluate if you still have problems at that point that may require fooling with the carb.
just my $.02
just my $.02
