383 very rich idle - 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 01-19-2011, 09:38 PM
Registered User
 
Last photo:
Join Date: Mar 2010
Location: USA
Posts: 218
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
383 very rich idle

Hello, ive had this engine for about a year and had always had 2 spark plugs that ran leaner than the rest of the plugs. Well i found that the intake had a leak in the front and also a little oil was seeping out, thats how i found the intake leak. Before I fixed the intake leak i was getting about 12hg vacuum at idle, now Im getting almost 17hg at idle at 850RPM. Now im having an issue where when i tune the carb optimally at idle for the highest rpm and vacuum, the plugs are a nice tan color after a drive, but it smells extremely rich and smokes horriblly. I have a holley double pumper 750 with a 6.5hg powervalve in the primaries and a block off in the secondaries. Im not sure what the jets are because its been a few months since ive had it apart.

What should i do to correct the rich idle? Before i fixed the vacuum leak I was getting about 15 city and up to 25 highway.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-19-2011, 10:54 PM
68NovaSS's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket
Last photo:
Join Date: Sep 2002
Location: Tri-Cities, Washington
Age: 67
Posts: 5,152
Wiki Edits: 9

Thanks: 86
Thanked 122 Times in 114 Posts
Is the smoking, black smoke, while driving or idle?

I assume the idle adjustment screws won't lean out the idle?

Jetting has nothing to do with idle, billowing black smoke accelerating, could be a jetting problem, high fuel pressure, float adjustment or stuck floats.

Can you see fuel dumping at idle?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-20-2011, 06:47 AM
bubbahotep's Avatar
Registered User
 
Last photo:
Join Date: Aug 2008
Location: NYC
Age: 42
Posts: 487
Wiki Edits: 0

Thanks: 1
Thanked 1 Time in 1 Post
What's your timing at idle?

Is your vac reading done in gear at idle (for an automatic)?

Your dizzy is advancing properly and fully?
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
Very rich idle NovaSS350 Engine 11 05-23-2008 04:15 PM
BG/BC Rich Idle & Idle Air Bleeds/IFR 68NovaSS Engine 3 11-10-2006 11:36 PM
Rich at idle but pinging on tip in? JoeS Engine 24 02-21-2006 08:02 AM
holley too rich at idle on 400 camino_man Engine 9 11-14-2005 04:12 PM
Rich idle Trav Engine 26 11-03-2003 09:42 PM


All times are GMT -6. The time now is 11:42 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.