engine spitting through carb - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-11-2013, 09:48 AM
Registered User
 
Join Date: Jun 2013
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
engine spitting through carb

I have a 66 ford 289 with 600cfm edelbrock carb 289 performer intake and edelbrock aluminum heads. I just installed the carb and a new msd distrubutor and coil. new plug wires and regaped the plugs according to the msd specs for this distrubitor with vaccum advance. engine has 1500 miles on it. got it running set timing to 6 degrees btd center. Had running for more than one time to set carb and tune in timing. Now will not run starts fine but will not stay running have to keep carb floored to keep engine running. only hitting on a few cylinders . at a loss for what to do??

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-11-2013, 09:59 AM
RWENUTS's Avatar
Registered User
 
Last photo:
Join Date: Nov 2011
Location: Nanaimo, BC, Canada
Age: 63
Posts: 2,059
Wiki Edits: 0

Thanks: 64
Thanked 220 Times in 208 Posts
Too much fuel pressure!
Eddy carbs like a max of 5.5 psi.
It's flooding!
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-11-2013, 11:18 AM
Registered User
 
Join Date: Jun 2013
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
well i have a gauge on it and new about the fuel pressure. I readjusted the pressure down to 5 psi had it at 6 no change. just will not run i reduced the primary jets and it still will not run. could not read the markings on the jets but i could tell the difference in the hole size lol. i need a new set of eyes to see those small markings.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-11-2013, 11:33 AM
RWENUTS's Avatar
Registered User
 
Last photo:
Join Date: Nov 2011
Location: Nanaimo, BC, Canada
Age: 63
Posts: 2,059
Wiki Edits: 0

Thanks: 64
Thanked 220 Times in 208 Posts
If you see any fuel inside the carb when you get it running then it's flooding. Reduce fuel pressure more or lower float level. Also bump your timing up to 12 degrees. That might help.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-11-2013, 12:08 PM
Registered User
 
Join Date: Jun 2013
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
well got the pressure down to 3 psi. advanced the timing best i could . since i can not get to to stay running. it is still flooding fuel on top of butterflies and black smoke coming out of exhaust. think i am done for the day or i might take it off and put a 12 gauge round down the throat. fustrated
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-11-2013, 01:56 PM
RWENUTS's Avatar
Registered User
 
Last photo:
Join Date: Nov 2011
Location: Nanaimo, BC, Canada
Age: 63
Posts: 2,059
Wiki Edits: 0

Thanks: 64
Thanked 220 Times in 208 Posts
You'll need to pull the top off the carb. Likely something in the needle/seat.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-11-2013, 02:22 PM
Registered User
 
Last photo:
Join Date: May 2013
Posts: 112
Wiki Edits: 0

Thanks: 7
Thanked 5 Times in 3 Posts
Is it a new carb?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-11-2013, 02:25 PM
Registered User
 
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 6,919
Wiki Edits: 0

Thanks: 4
Thanked 471 Times in 404 Posts
Quote:
Originally Posted by brad65mustang View Post
well got the pressure down to 3 psi. advanced the timing best i could . since i can not get to to stay running. it is still flooding fuel on top of butterflies and black smoke coming out of exhaust. think i am done for the day or i might take it off and put a 12 gauge round down the throat. fustrated
I'm assuming since you say there is fuel flooding on to the butterflies that to see this you've open the choke therefore the choke stuck closed can be eliminated; correct?

If the carb is flooding there are a number of possibilites:
1) Fuel pressure too high, seems like you've beat on this to no good end so the problem must be somewhere else.

2) Float levels too high, a strong possibility.

3) Loose or leaking inlet valves. If they are not seated in the carb housing or are missing gaskets they will leak and overfill the float bowls regardless of the float height setting. A similar situation would exist for cracked or broken parts of the valve or carb casting. Also, dirt or other damage to the needle valves or their seats would result in uncontrolled leakage which would not care about float height settings.

4) Having the metering rods either far out of adjustment or stuck in the raised (power) position. This would result in excess fuel delivery inspite of all other things being adjusted properly. The primary side of this carb uses pistons in bores with a spring that holds them up which is the power enrichment position. Manifold vacuum is applied to the underside of the piston which pulls it downward against the spring. The contention of forces between manifold vacuum and the spring determines the posiiton the metering rod assumes in the jet. Assembly of the primary metering rods can miss the primary jets, which usually ruins the rods by bending them, in this case fuel will meter without any control for mixture ratio. On the secondary metering is simply by jet, ala Holley. Aside from the jets possibly being too large this side is pretty fool proof.

The Edlebrock I'm assuming this is the Carter, rather than the Q-Jet they once upon a time also sold, is a bit risking and tricky to set up. But if you're lower inlet pressure and nothing is happening: I'd sure look

- to inoperative or damaged primary metering rods.

- incorrect float position which can happen for reasons of adjustment or the floats don't float.

- leaking inlet valves for reasons of assembly error or damage, or dirt.

- damage to the castings or missing parts that upset metering.

Bogie
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-11-2013, 05:32 PM
Registered User
 
Join Date: Jun 2013
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Tyler, it is a reman. has not even an hour run time.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 06-11-2013, 05:38 PM
Registered User
 
Join Date: Jun 2013
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
oldbogie, I pulled top off and put lower main jets in it. i also blew through every orifice with compressed air. there was no trash in the bowls and all gaskets were intact. What has me stumped it that it was running good and suddenly will not start with out missing and having the throttle wide open.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 06-11-2013, 05:45 PM
RWENUTS's Avatar
Registered User
 
Last photo:
Join Date: Nov 2011
Location: Nanaimo, BC, Canada
Age: 63
Posts: 2,059
Wiki Edits: 0

Thanks: 64
Thanked 220 Times in 208 Posts
Just because it's a reman doesn't gaurentee the floats are set right or the needle/seat is good. Changing the jets doesn't cure flooding.
Since reducing the fuel pressure didn't help then you gotta suspect float level. Maybe the float has a pin hole in it and has sunk.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 06-11-2013, 07:16 PM
Registered User
 
Last photo:
Join Date: May 2013
Posts: 112
Wiki Edits: 0

Thanks: 7
Thanked 5 Times in 3 Posts
I'm not that up to par on Edelbrock more of a Holley guy myself. But if the floats are off it will do the same thing. Try checking the float level first.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 06-11-2013, 07:43 PM
lakeroadster's Avatar
Hot Rods are Built, not Bought
 

Last journal entry: Lakeroadster's '31 Model A Tudor
Last photo:
Join Date: Dec 2001
Location: High Plains - Rocky Mountains
Age: 53
Posts: 670
Wiki Edits: 0

Thanks: 35
Thanked 93 Times in 85 Posts
Quote:
Originally Posted by RWENUTS View Post
You'll need to pull the top off the carb. Likely something in the needle/seat.
My thought also. I had a similar problem last year, but with a Holley. It was the secondary needle/seat stuck partially open.

Here's a video of what mine was doing... you can see the fuel dripping. Might be worth comparing to what your Edelbrock looks like?

Hope this helps.

Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 06-14-2013, 05:32 PM
Registered User
 
Join Date: Jun 2013
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
well lowered floats checked for trash in anything and found nothing. got another carb a 500 edelbrock going to try it tomorow.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Holley carb spitting fuel glennsea Engine 9 10-26-2010 05:57 AM
Engine spitting and misfiring. HELP !! Icelander Engine 10 03-01-2009 12:41 PM
spitting oil J_Johnson85 Engine 3 09-21-2008 09:14 PM
Help...spitting fire and then nothing jrm123180 Engine 8 05-27-2004 08:26 PM
Carb spitting mist out of the top Please help. firewood Engine 3 09-05-2003 12:14 PM


All times are GMT -6. The time now is 08:59 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.