The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-28-2008, 02:11 PM   #1
stump
Registered User
 
Join Date: Jun 2008
Location: bangor maine
Posts: 161
4.3 black smoke.. want to fix today if i can

my truck has been acting up lately, when just running in park you can see black smoke coming out, you stomp on it and it shoots a big cloud out.. feels like its lacking power to.. i read about cleaning the IAC but then i read it wont loose power.. either way i took the TB off and cleaned it.. seemed to help a little but not much... sooo whats the deal guys? i know its rich
stump is offline   Reply With Quote
Old 07-28-2008, 03:20 PM   #2
stump
Registered User
 
Join Date: Jun 2008
Location: bangor maine
Posts: 161
Re: 4.3 black smoke.. want to fix today if i can

just put a new O2 sensor.. didnt make a noticble differnce..
stump is offline   Reply With Quote
Old 07-28-2008, 03:23 PM   #3
f.monroe
Senior Member
 
f.monroe's Avatar
 
Join Date: May 2004
Location: Caldwell,Tx.
Posts: 3,648
Re: 4.3 black smoke.. want to fix today if i can

Sounds like it could be several things . If it is showing a Service Engine soon code , check it . I had one that sounds close and it had a bad EGR valve . You might remove it and check it .
Frank
__________________
Born and proudly residing in a Red State !
f.monroe is offline   Reply With Quote
Old 07-28-2008, 03:34 PM   #4
stump
Registered User
 
Join Date: Jun 2008
Location: bangor maine
Posts: 161
Re: 4.3 black smoke.. want to fix today if i can

tried a differnt egr valve.. no good.. im gona go try some other stuff

Last edited by stump; 07-28-2008 at 04:05 PM.
stump is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 11:45 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com