Fun In B.C.  

Welcome to the Fun In B.C. forums. your outdoor adventure headquarters.

As guest on our site, you have the chance to take a look around and get an idea of what we're all about. Feel free to check out some of the current topics of discussion and some of the stories of adventure gone by, by clicking on the top right picture to view past "Pictures of the week" .

Don't be shy, come on in. By joining our free community you'll be able to join in the fun with other outdoor adventurers and find out about upcoming events. you will also get access to View posted pictures. Stop sitting on the outside looking in, join today it's easy and it's FREE.

It's time for you to start having FUN..... in BC!!

If you have any problems with the registration process or your account login, please contact contact support.

HOTMAIL USERS: Check your 'junk mail' folder for the confirmation message and add 'funinbc.com' to your safe list so you don't miss anymore important emails from us.

Go Back   Fun In B.C. > All about your Ride > Chevy ramblings

Reply
 
Thread Tools
  #1  
Old 10-30-2010, 09:07 PM
longhorn's Avatar
longhorn longhorn is offline
Long where it counts
Swollen Member
 
Join Date: Sep 2004
Location: WL
Posts: 2,012
longhorn bad newbie
Reputation: 2
Backfiring

I have a 2000 Chev 1 ton with a 454.
It runs good and has lots of power but ....................

It backfires very loudly everytime you slow down.
Its getting worse, I try not to let it do it by slowing down slowly or gearing down but today if I just barley let off it backfires.

It backfires hard and loud it almost blows the box right off it.

Anyone got any ideas on what I should check?
Attached Images
File Type: jpg 100_5875 (Small).jpg (81.8 KB, 81 views)
Reply With Quote
  #2  
Old 10-31-2010, 03:24 AM
4skin's Avatar
4skin 4skin is offline
Cact
Swollen Member
 
Join Date: Feb 2010
Posts: 8,689
4skin Good newbie
Reputation: 15
its a chevy
sounds like unburnt fuel lighting in exhaust
posibly iac hanging up
havent played with one of those tbi setups for a while
pull idle air control solinoid of and clean it with fuel injection cleaner
or your washer fluid is low

Last edited by 4skin : 10-31-2010 at 03:31 AM.
Reply With Quote
  #3  
Old 10-31-2010, 03:58 AM
JackRabbit JackRabbit is offline
Newbie
 
Join Date: Apr 2007
Posts: 16
JackRabbit Unknown Newbie
Reputation: 10
if its a 2000 it should have the flat horrizontal style distributor cap and lots of times what happens is the spark cross fires when they get worn out. replace cap should fix it
Reply With Quote
  #4  
Old 10-31-2010, 09:52 AM
longhorn's Avatar
longhorn longhorn is offline
Long where it counts
Swollen Member
 
Join Date: Sep 2004
Location: WL
Posts: 2,012
longhorn bad newbie
Reputation: 2
Thanks guys ...............
I checked the waher fluid, and it was all good so it must be one of the others.
Reply With Quote
  #5  
Old 10-31-2010, 11:05 AM
kootenaycat's Avatar
kootenaycat kootenaycat is offline
I got kicked and now have a
Swollen Member
 
Join Date: Dec 2002
Location: In My Own Little World!
Posts: 4,625
kootenaycat bad newbie
Reputation: 0
I would check for exhaust leaks at or near manifolds, or if it has an air pump see if the thermactor air divertor valve is working. Sounds like it's sucking in air on decel which will cause unburnt fuel in exhaust to light off.
Reply With Quote
  #6  
Old 10-31-2010, 11:31 AM
offroadordrift offroadordrift is offline
Out-N-About
 
Join Date: Jul 2008
Location: mission
Posts: 368
offroadordrift bad newbie
Reputation: 8
why fix it. i bet it sounds bad ass
__________________

Reply With Quote
  #7  
Old 10-31-2010, 11:45 AM
longhorn's Avatar
longhorn longhorn is offline
Long where it counts
Swollen Member
 
Join Date: Sep 2004
Location: WL
Posts: 2,012
longhorn bad newbie
Reputation: 2
Quote:
Originally Posted by offroadordrift View Post
why fix it. i bet it sounds bad ass
Its getting so bad people in town run and hide when they see me coming.
Cops are going to start shooting back.
Reply With Quote
  #8  
Old 10-31-2010, 11:46 AM
longhorn's Avatar
longhorn longhorn is offline
Long where it counts
Swollen Member
 
Join Date: Sep 2004
Location: WL
Posts: 2,012
longhorn bad newbie
Reputation: 2
Quote:
Originally Posted by kootenaycat View Post
I would check for exhaust leaks at or near manifolds, or if it has an air pump see if the thermactor air divertor valve is working. Sounds like it's sucking in air on decel which will cause unburnt fuel in exhaust to light off.
Makes sense.
Is got a exhaust leak
Reply With Quote
  #9  
Old 10-31-2010, 11:48 AM
longhorn's Avatar
longhorn longhorn is offline
Long where it counts
Swollen Member
 
Join Date: Sep 2004
Location: WL
Posts: 2,012
longhorn bad newbie
Reputation: 2
Quote:
Originally Posted by 4skin View Post
its a chevy
sounds like unburnt fuel lighting in exhaust
posibly iac hanging up
havent played with one of those tbi setups for a while
pull idle air control solinoid of and clean it with fuel injection cleaner
or your washer fluid is low
And the air control solonoid is where?
In the line between the throttle body and the air cleaner?
Reply With Quote
  #10  
Old 10-31-2010, 02:11 PM
Kingblazer84 Kingblazer84 is offline
Not a Newbie
 
Join Date: Mar 2007
Location: Kelowna BC
Posts: 503
Kingblazer84 Unknown Newbie
Reputation: 10
IAC is located on the tbi throttle body should have a 4 prong plug on it. once pulled out have a look and if its covered in carbon and crap clean it off with some brake clean let it dry then reinstall it see if that fixes it if not i would recommend just buying a new one and putting it in and trying it. At the same time i would pull a plug and have a look and make sure they arnt fowled as well.
__________________
Project : "Snowpache"
Reply With Quote
  #11  
Old 10-31-2010, 05:00 PM
longhorn's Avatar
longhorn longhorn is offline
Long where it counts
Swollen Member
 
Join Date: Sep 2004
Location: WL
Posts: 2,012
longhorn bad newbie
Reputation: 2
Quote:
Originally Posted by Kingblazer84 View Post
IAC is located on the tbi throttle body should have a 4 prong plug on it. once pulled out have a look and if its covered in carbon and crap clean it off with some brake clean let it dry then reinstall it see if that fixes it if not i would recommend just buying a new one and putting it in and trying it. At the same time i would pull a plug and have a look and make sure they arnt fowled as well.
They tryed to sell me that thing inbetween the throttle body and the aircleaner.
It was almost $400 bucks?

OK I finally found the right thing and cleaned it.
It was sooted right up.
I looked on Ebay and they are $20 bucks , Lordco want $130 .
Anyone got any idea how much they should cost?

Last edited by longhorn : 10-31-2010 at 05:29 PM.
Reply With Quote
  #12  
Old 10-31-2010, 06:30 PM
Kingblazer84 Kingblazer84 is offline
Not a Newbie
 
Join Date: Mar 2007
Location: Kelowna BC
Posts: 503
Kingblazer84 Unknown Newbie
Reputation: 10
well we do live in canada so prob 130$ i think is what they go for considering it is a sensor... do you have or know someone with a discount? get it cheaper that way haha..
__________________
Project : "Snowpache"
Reply With Quote
  #13  
Old 10-31-2010, 06:43 PM
FU Toolbag's Avatar
FU Toolbag FU Toolbag is offline
Mad Builder
Swollen Member
 
Join Date: Mar 2003
Location: green house, kelowna
Posts: 2,353
FU Toolbag bad newbie
Reputation: 0
my cab/chassis one used to do that all the time. Found out that the muffler clamp was loose cause it regularly blew the muffler clean off. It was on some nice and flexy hangers so it usually whent back on my itself. Buddy saw this and almost crashed he was laughing so hard. I fixrd it by going to propane and chucking the aforementioned parts.
__________________
95k3500/6.5td/nv4500/4x4/crew/duellie/pretty
Towhoe well under way.
Reply With Quote
  #14  
Old 10-31-2010, 06:49 PM
longhorn's Avatar
longhorn longhorn is offline
Long where it counts
Swollen Member
 
Join Date: Sep 2004
Location: WL
Posts: 2,012
longhorn bad newbie
Reputation: 2
Quote:
Originally Posted by FU Toolbag View Post
my cab/chassis one used to do that all the time. Found out that the muffler clamp was loose cause it regularly blew the muffler clean off. It was on some nice and flexy hangers so it usually whent back on my itself. Buddy saw this and almost crashed he was laughing so hard. I fixrd it by going to propane and chucking the aforementioned parts.
So what was causing it?
Reply With Quote
  #15  
Old 11-01-2010, 07:37 PM
In The Zone's Avatar
In The Zone In The Zone is offline
Rock hard and ready to roll
Swollen Member
 
Join Date: Jun 2003
Location: abby... dont know why
Posts: 6,484
In The Zone bad newbie
Reputation: 0
exhaust leak
__________________
SO FAR SO GOOD SO WHAT
Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Style Design By: Resourcelabz.se