Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine
Register Forgot Password?

Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by Weld Racing
Click Here

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 05-18-2011, 03:59 PM   #1
Junior Member
 
Join Date: Feb 2010
Location: Overland Park, Kansas
Posts: 19
Car: 1984 Z28
Engine: 305
Transmission: auto

Classifieds Rating: (0)
Sputtering and black soot out of tailpipes

About a month ago I had the radiator hoses and water pump replaced on my '84 Z-28. It is not my everyday driver. In the few times I have driven it since I get quite a bit of smoke out of the pipes when I start it and also black soot on the ground under each of the pipes (see attached picture). Also, when I pull up to a stop sign it will sputter and die. It has progressively gotten worse and now it will die unless I shift it into neutral and rev it. Once it gets going it seems to drive fine. Can anyone give me some direction on what the problem may be? I only mention the new hoses and water pump because this problem began right when I had that done - it could be a total coincidence. Thanks for the help.
Attached Images
File Type: jpg IMG00301-exhaust.jpg (111.6 KB, 16 views)
3-Ball is offline vBGarage Page   Reply With Quote
Old 05-18-2011, 10:17 PM   #2
Supreme Member
 
Join Date: Sep 2002
Location: Cary, North Carolina
Posts: 9,192
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi

Classifieds Rating: (0)

Send a message via AIM to camaronewbie
Re: Sputtering and black soot out of tailpipes

It's running very rich. Coincedense with water pump replacement. Might be an ignition issue, timing issue, or fuel issue - is it a carbed car?
__________________
1992 25th Anniversary RS T-Top
350 Carb 10:1 Dometops Mild Cam
Hedmann Headers Hi-Flo Cat/Aerochamber Muffler
700R4 B&M Shift Kit LS1 Disc Rear w/3.42 Posi
Poly Bushings Eibach Prokit Bilstein Shocks/Struts
HOK Candy Teal on Silver Flake IROC Hood
camaronewbie is offline vBGarage Page   Reply With Quote
Old 05-19-2011, 02:00 PM   #3
Junior Member
 
Join Date: Feb 2010
Location: Overland Park, Kansas
Posts: 19
Car: 1984 Z28
Engine: 305
Transmission: auto

Classifieds Rating: (0)
Re: Sputtering and black soot out of tailpipes

It is carbed. Is that the likely problem?
3-Ball is offline vBGarage Page   Reply With Quote
Old 05-19-2011, 08:02 PM   #4
Supreme Member
 
Join Date: Sep 2002
Location: Cary, North Carolina
Posts: 9,192
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi

Classifieds Rating: (0)

Send a message via AIM to camaronewbie
Re: Sputtering and black soot out of tailpipes

I'm certainly no expert on the Quad carbs - but you need to figure out why it's running so rich. Could be a bad O2 sensor, TPS, IAC, ignition issue, timing issue, or a slew of other things I'm no expert on. I'm sure someone with more knowledge on these systems will chime in.
__________________
1992 25th Anniversary RS T-Top
350 Carb 10:1 Dometops Mild Cam
Hedmann Headers Hi-Flo Cat/Aerochamber Muffler
700R4 B&M Shift Kit LS1 Disc Rear w/3.42 Posi
Poly Bushings Eibach Prokit Bilstein Shocks/Struts
HOK Candy Teal on Silver Flake IROC Hood
camaronewbie is offline vBGarage Page   Reply With Quote
Old 05-19-2011, 08:15 PM   #5
Member
 
Join Date: Mar 2009
Location: San Antonio Texas
Posts: 130
Car: 1982 Trans Am, 1986 Gmc sierra
Transmission: 700r4

Classifieds Rating: (0)
Re: Sputtering and black soot out of tailpipes

is the black substance sludgy at all. Judgin by the picture it looks like unburnt fuel, when is the last time the engine has had a full tuneup? might be a good time to do it.

if it is indeed your carb its probably the choke circuit, the float is stuck or has filled with gas from age and doesnt float anymore.
jkrustchinsky is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 10:13 AM   #6
Junior Member
 
Join Date: Feb 2010
Location: Overland Park, Kansas
Posts: 19
Car: 1984 Z28
Engine: 305
Transmission: auto

Classifieds Rating: (0)
Re: Sputtering and black soot out of tailpipes

It is not sludgy at all. It is more like a fine powder. If I stick my hand at the end of the tailpipe it doesn't get damp at all - it just gets this black sooty powder on it. And I should probably add that when it is "chugging" right before it dies the choke light is coming on and off.

Last edited by 3-Ball; 05-20-2011 at 10:17 AM.
3-Ball is offline vBGarage Page   Reply With Quote
Old 05-20-2011, 10:13 AM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine

Tags
86, black, camaro, full, groud, headers, pipes, radiator, soot, spit, sputter, sputtering, tail, tailpipe, trans
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 03:27 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details