Alternative fuel pump

[Artkez]

Hello

New to the group just signed up ( 3 weeks ago ) and really enjoying the vast and enthusiastic knowledge shared in this group !!  Thanks so much

When i just got the car i think they replaced my old fuel pump with this Edelbrock pump since the original one  was making a internal loud noise.  I have been  running the car ( since i got my starter fixed) for about 1/2 hour on local tour of the neighborhood.  The drive  and engine running  seems normal but i do not have much experience to compare.

my question should i rebuild the old pump that seems original or will this modern pump do the trick as a temporary fix   Will this be a problem in HOT starts  ??  I notice  that after 30 minute drive if i shut down and then restart it does not run as well,  but i have not  experienced this HOT problem to a large extent  as it is relatively cold in California these past few weeks

Shall i keep this pump   Will it harm the car ??

Thanks

Arthur and Steve

[BobH]

Hello

If you're thinking about sending your pump out for refurbishment Bob Youngman is the man, his details are on here

https://www.sl113.org/forums/index.php?topic=36781.msg271861#msg271861

I would think that as long as the modern pump is delivering the correct amount of fuel/pressure it can't do any harm.  Perhaps compare the spec with the specs of the original pumps, details are in the Tech Manual

https://www.sl113.org/wiki/Fuel/Pump

[WRe]

Hi,
the delivery pressure of the fuel pump should be between 0.8 and 1.1 bar (11.6-16 psi) measured before the starting valve (CSV).

There was a discussion about alternatives:
https://www.sl113.org/forums/index.php?topic=28274.msg204018#msg204018
...WRe

[Pinder]

that pump at 4 tp 7 PSI is on the low side for pressure. should be above 11psi.   as a short term solution if its working for you probably OK but you should rebuild your original pump. They run nice and quiet and are the correct specs add value to your car.

[BobH]

Low fuel pressure may cause starting problems when the engine is hot, not so much when it's cold as there will be fuel added during cranking, not so when hot.  definitely worth getting your original pump refurbished and refitted, plus it restores originality, which is never a bad thing

[rwmastel]

At PagodaFest Chicago, it seemed that Bob wasn't doing rebuilds anymore.  He gave a good seminar on where to get rebuild kits and how to do it yourself.  Still, and excellent resource to contact for advice.  Great guy.

[BaronYoungman]

Still doing rebuilds just reach out. 630 903 9877 and if you are sending me a pump please please drain it. The post office already calls me in when packages smell of gas. Thanks Bob

[Artkez]

Thanks so much for the info and feedback, we really appreciate it !!!

I did contact bob  youngman  and will sent the old original pump for rebuild.  He is a very knowledgeable about pumps  - 
Thanks

The bright red pump Edlebrok  really looks funny when you view the undercarriage  -  I agree the originality is key with redoing the old pump

Arthur and Steve

[ja17]

 Yes, the fuel pressure is definitely too low. Hot starting will be the first problem you notice.

[Artkez]

Yes, the fuel pressure is definitely too low. Hot starting will be the first problem you notice.

Hi Joe

   Drove around yesterday for about 1 hour  in city driving, once i stopped the car and restarted, the engine was very rough almost as if  the idle was too low.  I am sure that if i did not stop the turn off the car i could continue driving with no problem, but as  soon   as you turn off the ignition it seems that it will drive differently .

Question  when you turn off the car and it is hot, there seems to be a  RESET issue that  make the car run very rough,  is there a  module  that gets activated when you turn on a   HOT car that otherwise was inactive ?

thanks

Arthur

[rwmastel]

... is there a  module  that gets activated when you turn on a   HOT car that otherwise was inactive ?

Regarding a "module", these cars don't have many electrical controls, and no computers.  Think about the physical conditions, most likely hot fuel with too low fuel pressure.  But, Joe and others have much more experience than I do.

[ja17]

Artkez, the problem will never be solved and will get worse as the weather warms. You're pressure is much too low. You are not getting enough circulation of fuel to cool the fuel system. Once you stop the fuel boils and you have a fuel system full of fuel vapor. There are other less expensive alternatives for temporary use or whatever. Try a Carter GP4601 HP ( around $100 new). A little noisy, but if you order their "quiet kit" with it, that will help quiet it down. Other choices also, but this is inexpensive and easy. Be sure to hang any electric pump level with the bottom of the fuel tank. All these electric fuel pumps are gravity fed!

[Artkez]

Hi Joe,

Thanks for the feedback, that is exactly what happened today , we went for a  45 min drive, the car was running beautifully for the first 30 min, then we sat at idle for about 10 minutes and exactly when the temp past 80 degree C the car started to feel rough, i gave it more gas  and about 3 minutes later it stalled.  I tried to restart with no luck,  then repeated for the next 15 min with no luck.  I opened the hood and about 1.5 hours later it started and crawled  back  home . 
So lesson learned, i will get a original rebuilt  fuel pump and install it and hope to see the difference in the hot running environment.  Thanks so much for the feed back

Arthur