The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-13-2014, 01:26 PM   #1
draggin49
Registered User
 
Join Date: Feb 2013
Location: Ojai, CA
Posts: 356
help with leaking carb....

So I went into town like I do every morning to get a cup of coffee.
Fired it up, let it warm up. Get going and suddenly the thing will hardly idle and is running super rough.it had been running great. Its a gm crate motor, all new accessories, new edelbrock 600cfm electric choke carb.

It died on me once on my way limping it home.

I get out , pop the hood and its visibly leaking gas!!

I snapped a pic of the spot on the carb where its leaking. I noticed there was a visible gap and that little piece was loose, its on the left hand side of the carb near the back

draggin49 is offline   Reply With Quote
Old 02-13-2014, 02:38 PM   #2
Molberg
Registered User
 
Molberg's Avatar
 
Join Date: Dec 2012
Location: Manitoba
Posts: 644
Re: help with leaking carb....

Hard to tell by your pic... Usually if it's pouring gas into/out of the carb it's either a sunken float... Or stuck needle and seat in my experience. Pop the top off the carb and see if your float is laying in the bottom. My old edelbrock afb left me in the side of the highway once. Brass float got a pin hole along the soldered seam ... And it sunk.
__________________
-Project Nitemare-

http://67-72chevytrucks.com/vboard/s...d.php?t=607359
Molberg is offline   Reply With Quote
Old 02-13-2014, 03:08 PM   #3
draggin49
Registered User
 
Join Date: Feb 2013
Location: Ojai, CA
Posts: 356
Re: help with leaking carb....

Ok, the plate is stuck I'm the upright position, barely will move a 1/4"

It seems to be hung up on this threaded screw


Do I need to unscrew that so it sits lower for no interference???so that the piece can have full range of motion??
draggin49 is offline   Reply With Quote
Old 02-13-2014, 03:23 PM   #4
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,542
Re: help with leaking carb....

No that screw is normal. It's for the high idle.
Open the throttle slightly and you should be able to close the choke slightly by hand and the screw will then be riding on the cam.
Do you have a fuel regulator?
geezer#99 is offline   Reply With Quote
Old 02-13-2014, 04:54 PM   #5
draggin49
Registered User
 
Join Date: Feb 2013
Location: Ojai, CA
Posts: 356
Re: help with leaking carb....

Hmmm, took it around the block, and it was fine.
draggin49 is offline   Reply With Quote
Old 02-13-2014, 05:09 PM   #6
draggin49
Registered User
 
Join Date: Feb 2013
Location: Ojai, CA
Posts: 356
Re: help with leaking carb....

But as I moved the throttle cable/linkage , the screw kept getting the fast idle linkage caught on it
draggin49 is offline   Reply With Quote
Old 02-13-2014, 05:40 PM   #7
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,542
Re: help with leaking carb....

It ran fine cause you had some crap in the needle/seat and now it's gone into the carb.
And for the second part, if it went on a high idle (the screw was resting on the cam) then your choke is set too rich.
geezer#99 is offline   Reply With Quote
Old 02-13-2014, 07:09 PM   #8
draggin49
Registered User
 
Join Date: Feb 2013
Location: Ojai, CA
Posts: 356
Re: help with leaking carb....

It never went on a high idle, it started off running normal/idling normal then it felt like it were running out of gas, so it was sputtering and idling rough.
draggin49 is offline   Reply With Quote
Old 02-13-2014, 07:33 PM   #9
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,542
Re: help with leaking carb....

So!
The high idle cam that's held on by the torx type screw.
Do you mean the high idle screw gets stuck behind the cam and not ride on top of it.
Is the screw tight?
geezer#99 is offline   Reply With Quote
Old 02-13-2014, 07:56 PM   #10
draggin49
Registered User
 
Join Date: Feb 2013
Location: Ojai, CA
Posts: 356
Re: help with leaking carb....

It was stuck, i backed the screw out a tad.now it looks like this position in the diagram:

draggin49 is offline   Reply With Quote
Old 02-13-2014, 08:16 PM   #11
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,542
Re: help with leaking carb....

If it was hanging up it would be closing your choke plate making it run rich and rough.
Hopefully it stays put.
geezer#99 is offline   Reply With Quote
Old 02-13-2014, 08:45 PM   #12
draggin49
Registered User
 
Join Date: Feb 2013
Location: Ojai, CA
Posts: 356
Re: help with leaking carb....

Thanks so much for the help, gonna drive it in a little bit, ill report back if I notice anything.
draggin49 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:13 PM.


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