back fireing through carb - 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 10-01-2002, 05:24 PM
New Member
 
Join Date: Sep 2002
Location: pa
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post back fireing through carb

i just rebuilt a 305 and when it starts it back fires through the carb. igot flames coming out of it

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-01-2002, 05:40 PM
54 Chevy's Avatar
Member
 
Last photo:
Join Date: Feb 2002
Location: Belleville MI
Posts: 92
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Firery carbs aren't very much fun. It sure gets your attention though.

Verify the plug wiring and firing order.

Set the TDC mark on the crank dampener to point at about the 8 to 10 deg mark (initial timing) turn the distributor so that the rotor is pointing to the number one plug.

If it still want to puke throught the carb then the distributor could be out by 180deg. Pull it and turn the rotor 180deg.

Good luck
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-01-2002, 05:44 PM
TurboS10's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Auto Terms and Definitions Used in Modern Engine T... Last photo:
Join Date: Sep 2002
Location: Texas
Age: 36
Posts: 3,463
Wiki Edits: 2

Thanks: 0
Thanked 0 Times in 0 Posts
Post

If it actually starts and then backfires, I would say timing is extremely slow. If it just trys then dies, it is prolly out 180.

Chris
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-01-2002, 06:24 PM
Member
 
Join Date: May 2002
Posts: 37
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

hey,
it sounds like your plug wires could be switched around as stated before. I did this early this spring when firering up my car, i could roast hot dogs over my carb. good luck
Matt
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-01-2002, 09:35 PM
New Member
 
Join Date: Sep 2002
Location: rio rancho nm
Posts: 23
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

The simple way, turn the engine until you see the intake valve go dowm then watch the damper and stop it ~15 deg before o deg, drop your distributor in rotor facing #1 (reguardless if it falls in the oil pump shaft) and reconnect your wires, make sure number 1 plug wire on the cap is in proximity of the rotor, pull number plug wire and stick a screwdriver in it and lay it next to your header or block. turn on your key and turn your distributor by hand until you get spark. hold your distributor and have someone else bump the motor until the distributor falls in the oil pump shaft.. tighten it down and she will breath...
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-01-2002, 11:00 PM
New Member
 
Join Date: Oct 2002
Location: Kansas
Posts: 16
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

You might have to run your valve adjustment again. You could have an intake valve not closing all the way.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-02-2002, 01:01 PM
New Member
 
Join Date: Sep 2002
Location: pa
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

thanx for every ones help. it runs great. 68chevelless454 got it the valves on the right side was to tight.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-02-2002, 01:46 PM
bullheimer's Avatar
NEVER use credit cards!
 

Last journal entry: car with tt2's, (stockers going back on)
Last photo:
Join Date: Jan 2002
Location: North of Seattle
Posts: 2,529
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
Post

OOOOH, HE'S A CAGEY ONE ALRIGHT!!
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 10-02-2002, 04:04 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 46
Posts: 4,875
Wiki Edits: 0

Thanks: 0
Thanked 71 Times in 59 Posts
Post

Roasted marshmellows anyone? :p
__________________
Outlawed tunes from outlawed pipes
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 10-02-2002, 04:05 PM
New Member
 
Join Date: Sep 2002
Location: pa
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

not to sound stupid but what does cagey mean
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 10-02-2002, 05:53 PM
Member
 
Join Date: Oct 2002
Posts: 144
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Colloquial US country saying. This means the fella sorta standing around on the periphery of things that knows exactly what's happening and how to cure or complete a problem vexing the crowd.


Whew. Didn't really knew I knew that. I need a beer and that's the truth.

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



All times are GMT -6. The time now is 10:16 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.