Trouble with Edelbrock
#1260297
07/01/12 03:39 PM
07/01/12 03:39 PM
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Joined: Jan 2008
Posts: 486 Sonoran desert, Arizona, USA
moparjo68
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 486
Sonoran desert, Arizona, USA
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Hi. I have a rebuilt 383 w/ a mild cam, stock 4 bbl intake and a 650 edelbrock carb w/electric choke. The carb has to be primed each and every time after sitting overnite or I just crank for 30 plus seconds. Once started, the motor will idle beautiful. No problems with warm up. DOES NOT TRY TO DIE when put in drive. No flat spots on exceleration. But when operated for 30 minutes or more, the motor starts to spit, splutter, and try to choke out only at low idle. Turn off motor, smell raw fuel. When I restart, motor does not want to start. (Electric choke is wide open. No problems w/choke) Have to press gas pedal half way to floor to finally get to start and I have to keep foot on gas pedal to keep motor running. Motor acts like its running on 4 cylinders. Read on Moparts about gas percolating in carb so I bought a half inch phelonic spacer. No change. So I bought a one inch spacer. No change. Tore carb apart. Checked float levels. They are perfect to factory specs. About ready to throw this EDELBROCK carb in garbage.
I once rebuilt a GM 400 and put a Carter AFB straight out of box. Had NOT ONE OUNCE of problems with the Carter. Tried to purchase a Carter AFB once again before purchasing Edelbrock I currently have but sadly found out I couldn't purchase Carter AFB's new anymore. Would love to hear from someone who has had similar problems and what carb did they change to to finally eliminate problems as I have mentioned. If changing back to Carter would eliminate this problem, I would search for a good used AFB or one to rebuild. Please help! Thanks, Joe
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Re: Trouble with Edelbrock
[Re: moparjo68]
#1260303
07/01/12 04:24 PM
07/01/12 04:24 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Get rid of the filter before the pump it doesn't go there, it goes after the pump. The new sock in the tank is all that's needed and it's the way our cars came new. The 10 micron filter your using makes it really hard to suck gasoline through and can't be done when it get's hot. And to the guys who say "I've been doing it for years", well it's wrong and todays gas can't tolorate it near as well as the old gas or racing gas.
Last edited by Challenger 1; 07/01/12 04:31 PM.
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Re: Trouble with Edelbrock
[Re: Challenger 1]
#1260304
07/01/12 04:30 PM
07/01/12 04:30 PM
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Joined: Jan 2008
Posts: 486 Sonoran desert, Arizona, USA
moparjo68
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 486
Sonoran desert, Arizona, USA
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I had fuel filter in factory location at one time. Problem existed then as now. Someone wrote on board that your problem was fuel filter needs to be behind fuel pump. So I moved it to present location. No change.
Last edited by moparjo68; 07/01/12 04:32 PM.
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Re: Trouble with Edelbrock
[Re: moparjo68]
#1260305
07/01/12 04:36 PM
07/01/12 04:36 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Well I can promise you the filter will be much more useful to you after the pump.
I think you should try it without and get back to us. I'm also postive it can't go there, no way will it work. Also I think you should jet it up one step too and make sure it's not building heat from being lean. How's the motor run? If it is lean, it will get the motor hot and affect fuel pump performance. Or it could be timing...
Last edited by Challenger 1; 07/01/12 04:41 PM.
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Re: Trouble with Edelbrock
[Re: moparjo68]
#1260307
07/01/12 04:42 PM
07/01/12 04:42 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Quote:
I had fuel filter in factory location at one time. Problem existed then as now. Someone wrote on board that your problem was fuel filter needs to be behind fuel pump. So I moved it to present location. No change.
never put a filter (unless its a high micron screen) on the suction side of a pump.
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Re: Trouble with Edelbrock
[Re: Challenger 1]
#1260308
07/01/12 04:44 PM
07/01/12 04:44 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Above idle see if the boosters are dripping. Mine are with a stock 318 mech pump. May need a regulator. come payday I'm getting a holley low psi one for my 1406 Eddy.
live every 24 hour block of time like it's your last day on earth
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Re: Trouble with Edelbrock
[Re: RUNCHARGER]
#1260313
07/02/12 01:16 AM
07/02/12 01:16 AM
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Joined: Oct 2007
Posts: 3,892 Oregon
hooziewhatsit
master
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master
Joined: Oct 2007
Posts: 3,892
Oregon
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Did you check to see if the boosters are spitting at idle like RapidRobert suggested? Also, I would check the fuel pressure to make sure it's not too high (nothing above 5.5psi EVER). When it's hot, turn it off, remove the air cleaner and look down the throats. If you see fuel pushing past anything, you have an issue somewhere. Allegedly Holleys are slightly better in the heat soak department since the bowls are insulated with gaskets from the main body, but then you would have a holley
If you ever find yourself in a fair fight, your tactics suck.
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Re: Trouble with Edelbrock
[Re: RapidRobert]
#1260314
07/02/12 01:44 AM
07/02/12 01:44 AM
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Joined: Jan 2008
Posts: 486 Sonoran desert, Arizona, USA
moparjo68
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 486
Sonoran desert, Arizona, USA
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Quote:
Above idle see if the boosters are dripping. Mine are with a stock 318 mech pump. May need a regulator. come payday I'm getting a holley low psi one for my 1406 Eddy.
I don't know what you mean by the boosters. Also, what did you mean by getting a holley low psi for your 1406 Eddy? Do you mean in exchange for?
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Re: Trouble with Edelbrock
[Re: moparjo68]
#1260315
07/02/12 02:25 AM
07/02/12 02:25 AM
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Joined: Nov 2006
Posts: 840 southern Idaho
moparcyco
super stock
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super stock
Joined: Nov 2006
Posts: 840
southern Idaho
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Quote:
Hi. I have a rebuilt 383 w/ a mild cam, stock 4 bbl intake and a 650 edelbrock carb w/electric choke.
Is that a 600 edelbrock or a 750?Dont think they have a 650.If it is a 750 throw that POS in the trash.600 will work fine same with an 800.This is not an edelbrock bashing,I have used 600 and 800's with great results.I had a 750 on a hot 360 had every problem you've described and then some.Started doing some reasearch and come to find out these carbs are CRAP.I would borrow another carb if you can and see if your problem goes away.If not fuel system somewhere
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