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Trouble with Edelbrock #1260297 07/01/12 03:39 PM 07/01/12 03:39 PM
Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA M moparjo68 OP mopar
moparjo68 OP mopar M Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA	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

Re: Trouble with Edelbrock [Re: moparjo68] #1260298 07/01/12 03:44 PM 07/01/12 03:44 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Your problem is in the fuel delivery system, NOT the carburetor!

Re: Trouble with Edelbrock [Re: Challenger 1] #1260299 07/01/12 03:48 PM 07/01/12 03:48 PM
Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA M moparjo68 OP mopar
moparjo68 OP mopar M Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA	Please explain? I have a mechanical fuel pump. Whats wrong with it?

Re: Trouble with Edelbrock [Re: moparjo68] #1260300 07/01/12 03:50 PM 07/01/12 03:50 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Your vapor locking when it get's hot, is there a filter before the fuel pump? And is a clean sock/strainer installed in the fuel tank on the end of the pickup?

Re: Trouble with Edelbrock [Re: Challenger 1] #1260301 07/01/12 03:56 PM 07/01/12 03:56 PM
Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA M moparjo68 OP mopar
moparjo68 OP mopar M Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA	The filter is new and its located before the fuel pump. The filter sock is new as well. Just replaced the fuel sending unit.

Re: Trouble with Edelbrock [Re: moparjo68] #1260302 07/01/12 04:22 PM 07/01/12 04:22 PM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	Gotta love that ethanol! Didn't get any bad gas did you? "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: Trouble with Edelbrock [Re: moparjo68] #1260303 07/01/12 04:24 PM 07/01/12 04:24 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	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.

Re: Trouble with Edelbrock [Re: Challenger 1] #1260304 07/01/12 04:30 PM 07/01/12 04:30 PM
Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA M moparjo68 OP mopar
moparjo68 OP mopar M Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA	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.

Re: Trouble with Edelbrock [Re: moparjo68] #1260305 07/01/12 04:36 PM 07/01/12 04:36 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	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.

Re: Trouble with Edelbrock [Re: moparjo68] #1260306 07/01/12 04:40 PM 07/01/12 04:40 PM
Joined: Jan 2003 Posts: 1,883 Northern OH R rapom top fuel
rapom top fuel R Joined: Jan 2003 Posts: 1,883 Northern OH	I had the same problem but not as serious as yours. I run a edelbrock 800 carb. I put a carter electric (the low pressure one that don't need a regulator) pump back at the gas tank and isolated it real well so I can't hear it. Completely solved the problem for the most part. Primes the carb before startup when the engine is hot. No more long cranking times. I was running out of gas on a fuel throttle blast when the car was hot. Bypassed the mechanical pump and solved the problem. I'm thinking that the Mechanical pump actually heated up the fuel and made it more prone to vapor locking. I did have a filter just before the mechanical pump so that may have exsaperated the problem also.

Re: Trouble with Edelbrock [Re: moparjo68] #1260307 07/01/12 04:42 PM 07/01/12 04:42 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	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.

Re: Trouble with Edelbrock [Re: Challenger 1] #1260308 07/01/12 04:44 PM 07/01/12 04:44 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	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

Re: Trouble with Edelbrock [Re: rapom] #1260309 07/01/12 05:07 PM 07/01/12 05:07 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: I had the same problem but not as serious as yours. I run a edelbrock 800 carb. I put a carter electric (the low pressure one that don't need a regulator) pump back at the gas tank and isolated it real well so I can't hear it. Completely solved the problem for the most part. Primes the carb before startup when the engine is hot. No more long cranking times. I was running out of gas on a fuel throttle blast when the car was hot. Bypassed the mechanical pump and solved the problem. I'm thinking that the Mechanical pump actually heated up the fuel and made it more prone to vapor locking. I did have a filter just before the mechanical pump so that may have exsaperated the problem also. FOR SURE! No doubt a properly pumbed electric pump is better at pumping todays gas, But it's not any better at sucking it because gas is very hard to suck, always has been. So it's tough to get a good delivery volume and gravity in your favor out of a stock tank for a electric, imo. Now a stock pump can still work with todays gas, but now the motor tune has to be right on so it don't run hot. And it has to be setup right with no leaks and a properly vented gas tank. I'm guessing that is a problem too, all too often that the fuel pump get's blamed for. Lastly I do have to admit that both my cars use mechanical pumps with hemi vapor separators with return line through the sending unit. I have burned alot of pump gas all over the country in real hi temps and real high altitudes and have never been let down. 2 weeks ago I was driving my 340 at near wide open throttle for like 3 miles at a time at 120 mph in 85 deree temps at 4600 feet. It never ran out of fuel and I ran the same car at bonneville a couple years ago, even more miles on a 95 degree day with no fuel delivery problems or cooling...at 120 mph. web page That's salt and it's everywhere underneath! Last edited by Challenger 1; 07/01/12 06:49 PM.

Re: Trouble with Edelbrock [Re: Challenger 1] #1260310 07/01/12 07:55 PM 07/01/12 07:55 PM
Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA M moparjo68 OP mopar
moparjo68 OP mopar M Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA	Has anyone had these symptoms as I described with their Edelbrock and managed to keep the factory mechanical fuel pump set up and just swap out for a different brand carburetor.................and it cured the problem?????????????????????

Re: Trouble with Edelbrock [Re: moparjo68] #1260311 07/01/12 11:42 PM 07/01/12 11:42 PM
Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA M moparjo68 OP mopar
moparjo68 OP mopar M Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA	Anyone??????????

Re: Trouble with Edelbrock [Re: moparjo68] #1260312 07/02/12 12:14 AM 07/02/12 12:14 AM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	Sorry man, the new gas is crap. I have dual Carter AFB's on my Hemi and they do the same thing. An electric pusher pump will solve the problem. The fuel is percolating. Sheldon

Re: Trouble with Edelbrock [Re: RUNCHARGER] #1260313 07/02/12 01:16 AM 07/02/12 01:16 AM
Joined: Oct 2007 Posts: 3,892 Oregon hooziewhatsit master
hooziewhatsit master Joined: Oct 2007 Posts: 3,892 Oregon	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.

Re: Trouble with Edelbrock [Re: RapidRobert] #1260314 07/02/12 01:44 AM 07/02/12 01:44 AM
Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA M moparjo68 OP mopar
moparjo68 OP mopar M Joined: Jan 2008 Posts: 486 Sonoran desert, Arizona, USA	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?

Re: Trouble with Edelbrock [Re: moparjo68] #1260315 07/02/12 02:25 AM 07/02/12 02:25 AM
Joined: Nov 2006 Posts: 840 southern Idaho M moparcyco super stock
moparcyco super stock M Joined: Nov 2006 Posts: 840 southern Idaho	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

Re: Trouble with Edelbrock [Re: moparjo68] #1260316 07/02/12 02:37 AM 07/02/12 02:37 AM
Joined: Oct 2007 Posts: 3,892 Oregon hooziewhatsit master
hooziewhatsit master Joined: Oct 2007 Posts: 3,892 Oregon	Quote: 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? The boosters are the the round things in the center of each barrel in the carb. In the first five seconds here, you can see them spitting fuel out (hope Cal doesn't mind if I link to his video ) http://www.youtube.com/watch?v=v-ucCl8KXoU&feature=relmfu RR is probably talking about getting a holley fuel pressure regulator. If you ever find yourself in a fair fight, your tactics suck.

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