460 keeps dying - 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 10-20-2008, 07:26 PM
72 grabber 51F-1 65 chevystang
 
Last photo:
Join Date: May 2008
Location: Dora Alabama
Age: 24
Posts: 314
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
460 keeps dying

I am asking this for a friend. he has a 78 F-100 4x4 with a 460. It has a 600 holley on it. It will stop running randomly and runs real rich. He said it will crank fine. I was wondering what could cause this. Thanks for ny help

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-20-2008, 07:50 PM
Registered User
 
Join Date: Oct 2008
Location: tenn
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
460 dying

hi have your friend to ck floats may be sinking or power valve
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-20-2008, 07:56 PM
T-bucket23's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 57
Posts: 5,362
Wiki Edits: 26

Thanks: 9
Thanked 145 Times in 128 Posts
You may also want to check for proper choke operation

Chet
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-21-2008, 07:23 AM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,983
Wiki Edits: 8

Thanks: 20
Thanked 242 Times in 218 Posts
My history with older Holley's and crappy running is that the power valve has gone to heaven, usually from a backfire while starting cold. Later Holley's have a check valve that will usually prevent these failures and there is a 'kit' that can be installed as well for less then $15 from Summit (their p/n Hly-125-500) plus a new 6.5 power valve.

Once that's fixed, then the choke usually needs some attention.

Another problem with Holleys - throttle shaft wear (Summit p/n HLY-20-48-1 for a 4160 is one of several repair kits)

Then - it might just need a major overhaul or just plain need to be trashed and a new one installed
__________________
Irelands child
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-21-2008, 10:02 AM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: Found an LQ9 today
Last photo:
Join Date: Dec 2005
Location: Carlisle, PA
Age: 41
Posts: 5,290
Wiki Edits: 16

Thanks: 18
Thanked 16 Times in 12 Posts
Our motorhome with a 460/holley was idling pig rich at about 400 rpms.

New power valve and a little tune up cured it.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-21-2008, 10:13 AM
Jmark's Avatar
Registered User
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,925
Wiki Edits: 0

Thanks: 13
Thanked 47 Times in 36 Posts
You may have two problems. In the '70's, the Ford ignition box gave everyone fits. If your friend still has the Ford electronic ignition, have him change the box. It's the silver rectangular box under the hood. It's about 5" square and has two wire harnesses coming out of it. The main symptom was the engine would just shut off for no reason, then usually fire back up again after coming to a stop and sitting for a few seconds or minutes.

you may also have a carb problem too. A blown power valve (very common) will really fatten up the mixture and cause smoking and horrible mileage.

Mark
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
All Aluminum 460 Block thunderbird87 Engine 14 06-01-2007 08:28 PM
Ford 460 vs 351W GranTorinoElite Engine 12 05-30-2007 10:31 AM
Issue with Ford 460 clutch onebadmerc Transmission - Rearend 1 02-22-2007 07:15 PM
460 flywheel, 400 pressure plate? billybob_v10 Transmission - Rearend 2 07-02-2004 12:51 PM
carbed 460 or EFI 302 CustomFord Engine 2 04-16-2003 05:23 AM


All times are GMT -6. The time now is 02:50 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.