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Carburation problems
https://www.slantsix.org/forum/viewtopic.php?t=38716		 Page 1 of 1
Author:  zerglin87 [ Wed Jan 20, 2010 5:20 pm ]
Post subject:  Carburation problems
Currently the carburator, a Holly 1940, Runs fine except when at idle, somehow the idle drops too low and then stalls, It was fine before and i was wondering if it is the economizer going bad or if it something else you all know.

What happened is that the mid range throttle power bogged down extremely to a point of stalling, I tried to fix this by adding Sea Foam into the gas tank and so far it taken care of that problem and a day later, at idle, it starts to lose its idle and lower it to a diesel and stalling point.

I really want this fixed before college, thanks.
Author:  SlantSixDan [ Wed Jan 20, 2010 6:02 pm ]
Post subject: 
The 1940 carb wasn't used in Chrysler products. 1920 (thru '73) and 1945 ('74 and later), yes. Which do you have? Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted here for free download.
Author:  zerglin87 [ Wed Jan 20, 2010 7:28 pm ]
Post subject: 
Oh crap im sorry i meant 1920 :/ I was in a hurry
Author:  carlherrnstein [ Sun Jan 24, 2010 6:03 pm ]
Post subject: 
Are you shure its a carburation problem? It could be plugs or mabye the vaccume advance,vaccume leak, pcv valve. good luck
Author:  66aCUDA [ Sun Jan 24, 2010 8:53 pm ]
Post subject: 
I would bet the Seafoam loosened up some crap from the tank and it lodged in the carb idle circuit.
Frank
Author:  Aggressive Ted [ Sun Jan 24, 2010 10:58 pm ]
Post subject: 
I am with Frank on this one. It has happened to me before. Pull the bowl and catch the contents to see what came loose then spray it out real good through the high and low speed air bleeds. Are you using 30R9 fuel injection hose? if not stock 30R7 fuel lines will deteriorate with the ethanol in the fuel and plug up the economizer body. I fought this until SL6 Dan mentioned doing the 30R9 upgrade.
Author:  zerglin87 [ Thu Jan 28, 2010 8:52 am ]
Post subject: 
Sorry for the long reply, seems everything mechanical or electrical around me is dieing :evil:

Any who, it just stopped doing that and went back to mid range, I agree with Ted and Frank, That is the most probable solution and the most probable problem, I will take a look at it, as well as other things tomorrow.

I know for damn sure its not the vacuum.

I also will add for Ted that the fuel line is stock, But If it really was junk from the tank wouldnt the fuel pump have taken the hit? Unless its a buildup of gunk.
Author:  Aggressive Ted [ Thu Jan 28, 2010 9:37 am ]
Post subject: 
The fuel pump and most filters will pass big enough debris to plug up the economizer body. I am running a filter/fuel water separator that goes down to two microns like used on diesels. It stops everything.....
Author:  zerglin87 [ Thu Jan 28, 2010 10:25 am ]
Post subject: 
Oh, where can I find something like that?
Author:  Aggressive Ted [ Thu Jan 28, 2010 1:53 pm ]
Post subject: 
Summit racing....click on the red link below my name to view pictures of it.
Double click on th epicture when it comes up for full screen slide show mode.
Author:  zerglin87 [ Mon Feb 01, 2010 1:37 am ]
Post subject: 
Thank you, by the way i fixed my problem, it was getting clogged up with gunk and such, and now it works fine so far for 4 days, I will be sure to look into the summit fuel filter.
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