[Z06] Running rich?
Thread Starter
Racer
Joined: Oct 2012
Posts: 431
Likes: 2
From: Kennesaw Georgia
Running rich?
I think my z is running rich because the back bumper gets covered in black stuff all the time. The car has a blackwing filter, long tubes, converters, and b&b catback. I assume the car has been tuned because there is no check engines lights, codes ect. What do you guys think? It's there any way to tell if its to rich other than taking it to a tuner?
Here is a video of the car on dyno day. Just seems to have some black smoke that could indicate a rich setting as well. Anyone with more knowledge out there have an opinion?
http://i1214.photobucket.com/albums/...52C7F42C9A.mp4
Here is a video of the car on dyno day. Just seems to have some black smoke that could indicate a rich setting as well. Anyone with more knowledge out there have an opinion?
http://i1214.photobucket.com/albums/...52C7F42C9A.mp4
Last edited by Gmzo6; Feb 7, 2013 at 01:17 PM. Reason: Video
Safety Car
Joined: Jan 2012
Posts: 3,811
Likes: 14
From: Lake Fork TEXAS
I think my z is running rich because the back bumper gets covered in black stuff all the time. The car has a blackwing filter, long tubes, converters, and b&b catback. I assume the car has been tuned because there is no check engines lights, codes ect. What do you guys think? It's there any way to tell if its to rich other than taking it to a tuner?
Melting Slicks
Joined: Jul 2010
Posts: 3,355
Likes: 113
From: Los Angeles
Thread Starter
Racer
Joined: Oct 2012
Posts: 431
Likes: 2
From: Kennesaw Georgia
doesn't burn hardly any oil. It is an 01 and they're known to burn a little but nothing crazy. I would guess I add 1/2 a quart a month, which I think is normal considering it does see high rpm's sometimes. So I'm leaning toward a crappy tune. I bought the car already modded so don't know a whole lot about its past.
Melting Slicks
Joined: Jul 2010
Posts: 3,355
Likes: 113
From: Los Angeles
Another thing - the first tune I had was overly rich. At the end of a drive, after shutting off the engine and exiting the car, I would smell gas every time. That seems like a sure-fire way of knowing you're rich (although it's probably not a necessary requirement).
Thread Starter
Racer
Joined: Oct 2012
Posts: 431
Likes: 2
From: Kennesaw Georgia
I wonder if it has anything to do with the o2 sensors or converters? I remember when I first bought the car it seemed low on power and I got on it hard and it blew a bunch of black stuff out the back and ran strong after that. Could the converters be stopped up?
Safety Car
Joined: Jan 2012
Posts: 3,811
Likes: 14
From: Lake Fork TEXAS
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Safety Car
Joined: Jan 2012
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From: Lake Fork TEXAS
This was a pretty hot topic a few weeks ago on the forum
Safety Car
Joined: Jan 2012
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From: Da U.P.
Usually your WOT AFR is on the dyno sheet they give you. Another possibility is do you floor it all day, every day? Even a cleanly tuned car will be a little dirty at WOT, just the nature of the beast. In my limited experience though, only a pig rich WOT AFR will make the bumper dirty in short order. Well a pig rich cruising AFR would too, but with no CEL it can't cruise that far off or it'd hit you for exceeding the 20 or 25 percent swing.
Safety Car
Joined: Jan 2012
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From: Da U.P.
I'm leaning heavily toward the tune myself, seeing how the car is modded and you're not 100% sure if it ever was tuned and even if it was, there's always the possibility that it still sucks. I was just throwing out ideas above.
Safety Car
Joined: Oct 2004
Posts: 4,816
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From: Plano TX
Are you in a closed loop idle or open loop idle?... You really need to have someone look at the tune.. Certain Codes can be programmed out too.. You may have O2 sensor issues as well.. A good tuner will be able to resolve your issues and have your car running to its full potential. It will be money well spent.. Good luck
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
Black stuff on your rear bumper is common on our car's.
A Oil catch can will help reduce it, but not eliminate it.
My understanding of the issue:
1.) Your pass side valve cover has a black rubber line running into your throttle body. Oil vapor will get into your intake manifold, and when it gets burned in your combustion chamber it will spew out some black crap out the mufflers.
2.) Your engine valley pan also has a line connected to it that goes into your intake manifold. There is also some oil vapor that will get into your manifold and burn in your combustion chamber that will show up as black crap out the mufflers. My black catch can in my pic (just in front of the pass side head) has helped cut down on the black crap, but not eliminated it.
Before my catch can was installed i had Silver Dollar sized "pools" of oil inside my intake manifold. After the catch can install the inside of my intake manifold was just "glossy" looking. No more pools of oil.
You can see the black hose running from the pass side valve cover to the throttle body. You can also see my oil catch can in front of my passenger side head.
Oil Catch can connections. From the valley pan to the intake manifold. Helps keep oil from reaching my intake manifold.
Hope this helps
Toque
A Oil catch can will help reduce it, but not eliminate it.
My understanding of the issue:
1.) Your pass side valve cover has a black rubber line running into your throttle body. Oil vapor will get into your intake manifold, and when it gets burned in your combustion chamber it will spew out some black crap out the mufflers.
2.) Your engine valley pan also has a line connected to it that goes into your intake manifold. There is also some oil vapor that will get into your manifold and burn in your combustion chamber that will show up as black crap out the mufflers. My black catch can in my pic (just in front of the pass side head) has helped cut down on the black crap, but not eliminated it.
Before my catch can was installed i had Silver Dollar sized "pools" of oil inside my intake manifold. After the catch can install the inside of my intake manifold was just "glossy" looking. No more pools of oil.
You can see the black hose running from the pass side valve cover to the throttle body. You can also see my oil catch can in front of my passenger side head.
Oil Catch can connections. From the valley pan to the intake manifold. Helps keep oil from reaching my intake manifold.
Hope this helps
Toque
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
Have you taken a look inside your intake manifold ?
Does not take long to pull off the flex hose in front of your TB and use a flash light to look inside your intake manifold. See if you can see any pools of oil. Just a thought.
Toque