chevy 350 runs good then backfires under load - 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 04-30-2013, 08:13 PM
68 firebird's Avatar
Registered User
 
Last photo:
Join Date: Feb 2013
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
chevy 350 runs good then backfires under load

i have a chevy 350,standard bore engine,4 bolt main.comp cam 270 h-10 grind.edelbrock 600 carb.410 gears,4 speed saganal tranny in a 68 firebird...engine runs good then out of nowhere it starts to backfire under load.after it has run for about a half hr.ran good all last year.just startind doing this.i would be thankful in any body can give me a direction to go to figure out the problem.can this be timing or carb.thanks in advance for your comments

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-30-2013, 08:19 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: Nine Mile Falls, Washington
Posts: 5,223
Wiki Edits: 9

Thanks: 102
Thanked 131 Times in 122 Posts
Simple first, have you looked at the dist cap for moisture, crud on the tower contacts, cracks or carbon tracking? Vacuum leaks?
__________________
Boost adds dignity to what would otherwise be a vulgar brawl...

Midnight Sun Street Rod Association
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
chevy 350 backfires out intake. what causes this glhx Engine 4 07-08-2010 04:03 AM
73 Gran Torino Sport 351W 650 Holley Backfires when under load. 73Torino Engine 11 11-30-2009 02:15 PM
sbc 350 w/ holley 650cfm.. cant get good throttle response and backfires.. HELP pleas deanedge1 Engine 15 11-20-2009 07:16 AM
350 chevy engine backfires thru carb toms1940chevy Hotrodding Basics 8 09-23-2009 07:24 PM
350 won't start, backfires, starter smokes, runs rough... 1970customcamper Engine 3 09-08-2009 08:57 PM


All times are GMT -6. The time now is 06:53 PM.


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.