newly rebuilt quadrajet problem - Hot Rod Forum : Hotrodders Bulletin Board -- 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 08-26-2009, 06:35 PM
dawg's Avatar
Last photo:
Join Date: Aug 2004
Location: Colebrook Connecticut
Age: 56
Posts: 924
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 7 Posts
newly rebuilt quadrajet problem

after problems with vacum leaks at the base bushings and a stuck accel pump I had the carb rebuilt by a reputable carb shop.
every carb he built for me worked flawlessly.
except this one.
ok mixture screws set at 4 turns out
19" of vacum
no external vacum leaks.
primaries work great but once I get into secondaries it sputters and breaks up a bit.
doesnt seem to open secondaries at all?
but in park and operating without a load they open?
any ideas?
Im a holley man and this quadrasuck is a pita!

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 08-26-2009, 06:56 PM
DoubleVision's Avatar
Not Considered a Senior Member
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 41
Posts: 10,675
Wiki Edits: 0

Thanks: 15
Thanked 65 Times in 60 Posts
It`s not a Quadrasuck. Just because you don`t understand it don`t make it junk. No, the secondary`s don`t operate sitting in park. On some they will and this indicates the secondary thottle plates are out of adjustment. Also be aware there is a secondary lock out tang connected to the choke assembly, if the choke`s not fully opened the lock is in place. If your going down the road and kick it and it back fires then it`s too lean which is a easy fix by simply changing the secondary metering rods for richer ones. You don`t have to remove a bowl or get fuel on you to do so, it`s a simple 3 minute process. The other possibility is the secondary air flaps are either out of adjustment or the spring that has adjustable tension is broken, it also could be the fuel pump is not keeping up the demand for enough fuel. Take the time and read up about Quadrajets and how they work. You`ll be surprised at the number of advantages they have and how simple they are. They look complicated but there not, they operate almost the same as any other carb. The Quadrajet is a Air Dam carb which means it gives the engine what it demands and no more. All I use is Quadrajets. After years of fooling with holley`s and there poor quality control as well as many other carbs I went back to Q-jets and when you learn to tune them they are deadly contenders.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-27-2009, 05:41 AM
dawg's Avatar
Last photo:
Join Date: Aug 2004
Location: Colebrook Connecticut
Age: 56
Posts: 924
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 7 Posts
ok took the car out this morning and secondaries open up fine?
I hate intermittent problems.
no ill stick with holleys after all thats all youll see at the track lol.
Reply With Quote Quick reply to this message

Recent Engine posts with photos
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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
Yargh, carbureator problem is driving me nuts (but not my car!) caustic meatloaf Engine 12 05-21-2006 01:41 PM
Heat Soak Problem Solved... 73oldsman Electrical 2 04-19-2006 07:32 PM
Found low oil pressure problem.... kc_ksom Engine 2 09-06-2005 08:01 PM
Yet another small block problem... IWasBlown Engine 3 07-11-2003 09:23 PM
Mind Boggling Overheating Problem!!!!! chevyelc81 Engine 14 08-29-2002 04:58 PM

All times are GMT -6. The time now is 02:59 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright 1999 - 2012. All Rights Reserved.