Go Back   The Supercar Registry > General Discussion > Technical & Restoration


Reply
 
Thread Tools Display Modes
  #1  
Old 09-12-2017, 03:54 PM
YENKO DEUCE REGISTRY's Avatar
YENKO DEUCE REGISTRY YENKO DEUCE REGISTRY is offline
Yenko Contributing Member
 
Join Date: Apr 2000
Location: PA
Posts: 13,092
Thanks: 715
Thanked 296 Times in 137 Posts
Default Holley 4555 Secondaries

I fired up my Yenko this past weekend, but fuel is literally pouring into the secondaries, it will barely stay running. I pulled the carb, removed the fuel bowl and looks the matter!! Any insights as to what would cause such a fuel dump?!
__________________
Marlin
70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride)
69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride)
67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
Reply With Quote
Click here to view all the pictures posted in this thread...
  #2  
Old 09-12-2017, 04:05 PM
earntaz earntaz is offline
Yenko Contributing Member
 
Join Date: Mar 2010
Location: Republic of Texas
Posts: 4,620
Thanks: 6,842
Thanked 647 Times in 360 Posts
Default

Too much fuel pressure, crap in the needle/seat, float (if plastic) too heavy (absorded fuel). Just a few things to check ... Craig
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know!
Reply With Quote
  #3  
Old 09-12-2017, 04:26 PM
seventieshow seventieshow is offline
Senior Member
 
Join Date: Oct 2016
Location: Phoenix AZ
Posts: 313
Thanks: 352
Thanked 93 Times in 69 Posts
Default

As earntaz said, needle/seat or float issue most likely. Also make sure the secondary air bleeds are clean, modern gas gets gummy fast on cars that don't get driven frequently.
Reply With Quote
  #4  
Old 09-12-2017, 04:32 PM
L78steve L78steve is offline
Senior Member
 
Join Date: May 2006
Location: Hendersonville NC
Posts: 944
Thanks: 7
Thanked 33 Times in 30 Posts
Default

Quote:
Originally Posted by seventieshow View Post
As earntaz said, needle/seat or float issue most likely. Also make sure the secondary air bleeds are clean, modern gas gets gummy fast on cars that don't get driven frequently.
Especially if you don't use the secondary's much.
__________________
"Knowledge is good" Emil Fabor
67 L/78 Camaro SS/RS H-H,1W,2LGSR,3SL,4K,5BY. (Sold)
70 L/78 Nova M-21,Black Cherry,Sandalwood Int.
09 Pontiac G8 GT Premium,Sport,Roof. Liquid Red.
Reply With Quote
  #5  
Old 09-12-2017, 05:52 PM
YENKO DEUCE REGISTRY's Avatar
YENKO DEUCE REGISTRY YENKO DEUCE REGISTRY is offline
Yenko Contributing Member
 
Join Date: Apr 2000
Location: PA
Posts: 13,092
Thanks: 715
Thanked 296 Times in 137 Posts
Default

Ok, I'll just replace everything, I don't wanna mess around - plus it's a good tutorial for Benjamin to see how a Holley comes apart, and hopefully goes back together!
__________________
Marlin
70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride)
69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride)
67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
Reply With Quote
  #6  
Old 09-12-2017, 07:13 PM
jdv69z's Avatar
jdv69z jdv69z is offline
Yenko Contributing Member
 
Join Date: Mar 2017
Location: Cincinnati
Posts: 133
Thanks: 0
Thanked 34 Times in 22 Posts
Default

Has it been a while since it has been run? Sounds like stuck float to me. I've had this happen a couple of times. Fix might be as simple as opening float sight plug, and moving float up and down with a screw driver to free it up.
Reply With Quote
  #7  
Old 09-12-2017, 09:14 PM
earntaz earntaz is offline
Yenko Contributing Member
 
Join Date: Mar 2010
Location: Republic of Texas
Posts: 4,620
Thanks: 6,842
Thanked 647 Times in 360 Posts
Default

Marlin -- let us know what you find ... Craig
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know!
Reply With Quote
  #8  
Old 09-13-2017, 09:49 PM
VintageMusclecar's Avatar
VintageMusclecar VintageMusclecar is offline
Senior Member
 
Join Date: Jul 2003
Posts: 3,366
Thanks: 158
Thanked 161 Times in 46 Posts
Default

Needle & seat is probably stuck.

Read this
Reply With Quote
The Following User Says Thank You to VintageMusclecar For This Useful Post:
John Brown (09-14-2017)
  #9  
Old 09-14-2017, 12:36 PM
John Brown's Avatar
John Brown John Brown is online now
Yenko Contributing Member
 
Join Date: Mar 2002
Location: South Bend, Indiana
Posts: 2,729
Thanks: 258
Thanked 407 Times in 191 Posts
Default

^^^^
Should be required reading for anyone that has a Holley carburetor.
__________________
......................
John Brown

This isn't rocket surgery.....
Reply With Quote
Reply

Thread Tools
Display Modes

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. The time now is 11:17 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.

O Garage vBulletin Plugins by Drive Thru Online, Inc.