Go Back   Corvette Forum > C6 Corvette, 2005 - 2013 > C6 Corvette General Discussion
Sign in using an external account
Register Forgot Password?
Register Albums Search Today's Posts Mark Forums Read FAQ
Search
C6 Corvette General Discussion
General C6 Corvette Discussion not covered in Tech Sponsored by
PFYC

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

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 Corvetteforum.com today!


Corvette Store
 
 
C6 Parts & Accessories
C5 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 10-02-2013, 09:48 AM   #1
Eppieguy
CF Senior Member
 
Eppieguy's Avatar
 
Member Since: Jun 2008
Location: Somerville New Jersey
Default Slight Hesitation / Black Soot

2009 Base M6 w/ 14,800 on the clock. Not a daily driver but when I drive it (usually once a week) I don't baby it. Lately when i'm lugging it I've noticed a slight hesistation in it but goes away real quick when it give it a little more throttle. I wasn't 100% sure it was a hesitation but lately I've noticed after putting 200 ish miles on it that my center exhaust pipes are real black with soot. I've never seen them get that dirty that quick before. I have M2W installed that why it's on the center pipes I believe. I poured a container of Seafoam in to the fuel in the last week of Auguest and drove it to the tank was almost empty. I use Exxon Premimum fuel only in the car. Any ideas?

Thanks!
__________________
Eppieguy is offline   Reply With Quote
Old 10-02-2013, 10:34 AM   #2
Seadawg
CF Senior Member

 
Seadawg's Avatar
 
Member Since: Nov 2006
Location: Ormond Beach Florida
Default

It could be a dirty air filter or MAF sensor, or it could be normal. Do you have the stock or aftermarket air intake system?

If aftermarket and it is an oiled air filter, it can contaminate the sensor.

The center pipes do get "black" with normal driving, if left "open" with the MTW switch.

IF the car is in "good tuning" conditionmeaning no current issues, an aftermarket tune will greatly eliminate the pipe buildup.

These cars naturally run a little rich it seems.
Seadawg is online now   Reply With Quote
Old 10-02-2013, 11:29 AM   #3
Eppieguy
CF Senior Member
 
Eppieguy's Avatar
 
Member Since: Jun 2008
Location: Somerville New Jersey
Default

No CAI, OEM Filter, never looked at it to be honest. Stock tune as well. The pipes have never gotten this direty this quickly, only in the last few weeks. Last night I got on it in competition mode and it gave me poof of black carbon out the pipes, it's never done that before either.
__________________
Eppieguy is offline   Reply With Quote
Old 10-02-2013, 11:49 AM   #4
John Harry
CF Senior Member
St. Jude Donor '10-'11-'12-'13-'14

 
John Harry's Avatar
 
Member Since: Nov 2007
Location: Pittsburgh PA
Default

Loose spark plug wire? Just a guess.
John Harry is offline   Reply With Quote
Old 10-02-2013, 12:03 PM   #5
jack5hd
CF Senior Member
 
Member Since: Apr 2011
Default

How often do you lug the motor?.i never let tach below 2grand...........you might need an italian tuneup...........:d
jack5hd is offline   Reply With Quote
Old 10-02-2013, 12:06 PM   #6
jack5hd
CF Senior Member
 
Member Since: Apr 2011
Default

Your motor might have a lot of carbon build up if you lug it all time.seafoam doing it's job..go to shell gas and fill it up with 93 and go run car hard...........
jack5hd is offline   Reply With Quote
Old 10-02-2013, 12:51 PM   #7
Eppieguy
CF Senior Member
 
Eppieguy's Avatar
 
Member Since: Jun 2008
Location: Somerville New Jersey
Default

I dont lug it often and everytime I do drive it I do drive it hard at least once to blow it all out. This has started within the last month or so, something has changed, just not sure what it could be.
__________________
Eppieguy is offline   Reply With Quote
Old 10-02-2013, 06:27 PM   #8
RocketDawg
CF Senior Member
CI 6-7-8 Veteran
St. Jude Donor '09
 
Member Since: Sep 2004
Location: Madison (Huntsville) Alabama
Send a message via Yahoo to RocketDawg
Default

I also have an '09 but it's an A6 and I get a hesitation too; it's always after I've coasted (say slowing down for a red light that turns green before I stop) and then touch the gas to speed up "normally". The hesitation doesn't last long, but it's there. I've had dealers check it 4 times and an independent shop check it once and they say they can find nothing wrong.

I don't have any more than the normal amount of soot on the tips though, and I don't get smoke when I accelerate hard.
RocketDawg is offline   Reply With Quote
Old 10-03-2013, 07:15 AM   #9
Seadawg
CF Senior Member

 
Seadawg's Avatar
 
Member Since: Nov 2006
Location: Ormond Beach Florida
Default

Have you checked it for any codes?
Seadawg is online now   Reply With Quote
Old 10-03-2013, 07:26 PM   #10
Eppieguy
CF Senior Member
 
Eppieguy's Avatar
 
Member Since: Jun 2008
Location: Somerville New Jersey
Default

Quote:
Originally Posted by Seadawg View Post
Have you checked it for any codes?
No, I have not, it's not showing any lights nor has it in the past but I will check since I have a scanner which is collecting dust anyway.
Eppieguy is offline   Reply With Quote
Old 10-04-2013, 09:51 AM   #11
Chevy Cust Svc
CF Senior Member
 
Chevy Cust Svc's Avatar
 
Member Since: Mar 2010
Default

Hi Eppie,

Use the dusty code reader! Let us know what codes, if any come up. If you do decide to have it checked out, let me know. I am not technical but I can help in other ways. Have a great weekend and hopefully you have her up and running well by next week,

Kelly J.
Chevrolet Customer Care
Chevy Cust Svc is online now   Reply With Quote
Old 10-04-2013, 09:51 AM
 
Go Back   Corvette Forum > C6 Corvette, 2005 - 2013 > C6 Corvette General Discussion
Reload this Page Slight Hesitation / Black Soot
 
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Click for 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

Forum Jump


All times are GMT -4. The time now is 07:23 PM.


Emails & Password Backup

Search Engine Friendly URLs by vBSEO 3.5.2