The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=4)
-   -   How to adjust choke pull-off on Holley style Summit carb? (https://67-72chevytrucks.com/vboard/showthread.php?t=569412)

JFetter 03-06-2013 07:01 PM

How to adjust choke pull-off on Holley style Summit carb?
 
1 Attachment(s)
I have a Summit SUM-M08600VS that is acting up. Quite often when starting, it will not start at all. (unless I depress the pedal and hold it that way)

I suspect it is flooding, and think that it's due to lack of air.

Here's my carb:
http://www.summitracing.com/parts/sum-m08600vs

I've read that it's just a holley knockoff.


I have reset the electric choke housing to the 'factory' condition (index marker), but as I understand it, this shouldn't matter anyway. This is a problem during initial startup.

Some old holley guides talk about using a bent paper clip to adjust the "Choke Qualifying adjustment", but I don't think that applies to my carb?? Pic attached.



I'm suspecting vacuum leak or adjustment problem.

Am I on the right track here?

Is there an easy way to check the choke pull-off operation without the engine running? I.E pulling off one of the vacuum hoses and attaching to a vacuum tool?

I'm very new to carbs and sort of learning on my own here.

Thanks!

geezer#99 03-06-2013 10:14 PM

Re: How to adjust choke pull-off on Holley style Summit carb?
 
When you finally get it running, where is the level of the gas in the site glass?

JFetter 03-07-2013 06:46 AM

Re: How to adjust choke pull-off on Holley style Summit carb?
 
About 1/2 full.

geezer#99 03-07-2013 10:22 AM

Re: How to adjust choke pull-off on Holley style Summit carb?
 
Lower the fuel level to 1/4 of the sight glass on both bowls. Might stop your flooding and starting problem.

JFetter 03-07-2013 02:24 PM

Re: How to adjust choke pull-off on Holley style Summit carb?
 
Ok thanks! I'll give that a try.


All times are GMT -4. The time now is 11:50 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com