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question of the day
https://slantsix.org/forum/viewtopic.php?t=48838		 Page 1 of 1
Author:  1970-dart [ Sat May 19, 2012 5:23 am ]
Post subject:  question of the day
here is a pic i got out my Holley 1920 manual of the pump diaphragm.. I have been having many different issues with my carb and I know I need a new one but right now with a 20 day vacation coming up buying expensive unneeded parts is not an option.

I rebuilt the carb with the walker kit and an new float it adjusted fine and it runs good other than the occasional flooding issue and now and then percolation which I know I can fix with instructions from other methods found on here..

but after looking more at the diagram I realize that my carb does not have a drive spring ( i must have lost it )on the diaphragm stem. Now of course I know I need this spring as it is part of the carb but also other than the now and then flooding issue it runs fine..

My question is would missing that spring cause the occasional flooding issue and the percolation issue that I did not have before the rebuild. Also the kit came with a thin base gasket and think one as well.. I used the thin one because thats what was on there to begin with but somewhere someone said use the think one but i'm not sure the studs are long enough to use the thick one.


Thank you in advance



Image
Author:  bcschief [ Sat May 19, 2012 7:57 am ]
Post subject: 
P/N 66-15 try here https://buy.walkerproducts.com/carburet ... ts/holley/ for missing spring.

Brian
Author:  SlantSixDan [ Sat May 19, 2012 3:00 pm ]
Post subject:  Re: question of the day
Quote:
would missing that spring cause the occasional flooding
No.
Quote:
and the percolation
No.
Quote:
I used the thin one
That's wrong, use the thick base gasket. The thin one will aggravate flooding/percolation and will throw off your choke and kickdown geometry.

The missing accelerator pump drive spring will cause hesitation on attempting to accelerate.
Author:  1970-dart [ Sat May 19, 2012 6:06 pm ]
Post subject: 
thank you guys i will change out the thin one for the thicker one and hope that fixes most of my troubles.. now to just fix the window i broke while mowing the lawn :shock: ughhhhhhh
Author:  1970-dart [ Tue May 22, 2012 4:54 am ]
Post subject: 
ok put on the thick gasket and it seemed to cure the peculation issue up nicely.. It still has some fits and i'm not sure if its a flooding issue or something else..

When it is running down the road at highway speeds it runs like a champ and has plenty of power all through the band with no pinging or stumbling on take off.. What it does is sometimes not always at lower rpms like coasting to a stop or sitting idle at a light or traffic it will start to run a little rough. If i rev it up a bit it clears it out and goes back to a smooth idle until its next random time to do it again..

It is not coming out the top of the float bowl vent like it used to so I am assuming the float is not to high anymore. Could this be the float is maybe to low or my adjustment is still off or maybe needle and seat issue.. When I rev it up some to clear it out back smoke coems out so I figure thats is from to much gas going into carb but it just idles a little rough it never quits or has gas running out of it anywhere..


Thanks in advance
Author:  wjajr [ Tue May 22, 2012 5:14 am ]
Post subject: 
Quote:
When I rev it up some to clear it out back smoke coems out so I figure thats is from to much gas going into car

I would say that you are still experiencing intermittent high fuel level from possible crud holding the needle valve open until the fuel demand increases enough to allow said crud to pass. Or, perhaps the float is a bit fuel soaked and not able to seal needle valve fully during low fuel demand such as idle.
Author:  1970-dart [ Tue May 22, 2012 7:33 am ]
Post subject: 
its new needle and seat and float but of course i know that dont always mean anything lol
Author:  1970-dart [ Wed May 23, 2012 4:18 am ]
Post subject: 
Hi Dan or anybody else

i have a question for you on the spring for the pump in my carb..i have been doing lots of research on this to find out all the info i can so i dont have to ask to many questions.. I was going to buy a new pump return spring and then i found this thread

http://www.forabodiesonly.com/mopar/...d.php?t=124987

and it looks like you said that only the round stem pumps needed the spring and not the flat( which is what i have) but the pic out of the manual shows a spring on the flat stem pump.. i know that could be just for illustration but Im more lost now than i was to begin with if that is possible lol

and also i see in the pics on the walker site there looks to be a little black cap looking thing that goes on the end of the needle and seat assembly and the needle sticks out through it and mine is missing that as well..

thanks
Author:  SlantSixDan [ Wed May 23, 2012 10:11 am ]
Post subject: 
Your accelerator pump needs a drive spring or it will not work; it's a spring-driven pump.

There are various designs of inlet needle and seat; I like the capped one www.daytonaparts.com supplies. Haven't seen the capped type in a Walker kit.
Author:  1970-dart [ Wed May 23, 2012 11:16 am ]
Post subject: 
Perfect Dan thanks and I will get one ordered off the walker site. The part is .45 plus tax and shipping which comes to like 11 bucks lol oh well.

Ya the cap on mine was broke and the walker kit did not come with one but the illustration on thier site for each needle and seat kit seperatly shows the cap go figure lol


Thanks you came through again :)
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