I seem to have an excessive amt of black soot inside exhaust pipes??

[PaulRV6]

The car seems to run fine but I question the black soot that collects on the inside of the ends of both pipes. Why does this car compared to all my other cars seem to run extremely rich, why else would there be so much black soot when I run my finger around the pipe. I still believe its too rich. I don't run a cat converter so could this be causing what I think to be a problem or is evryone else's exhaust the same way? I don't think this is normal. How about you.

paul

 

[Steve V]

What are your scantool BLMS and INTs? I bet it is ok as removing a cat(illegal) does things like that. TT chips are open loop at idle and that is richer than closed loop.

 

[84BuickGNYorkPA]

The car seems to run fine but I question the black soot that collects on the inside of the ends of both pipes. Why does this car compared to all my other cars seem to run extremely rich, why else would there be so much black soot when I run my finger around the pipe. I still believe its too rich. I don't run a cat converter so could this be causing what I think to be a problem or is evryone else's exhaust the same way? I don't think this is normal. How about you.

paul

Paul,

Unless you take it to a shop so that they can put a temp wide band O2 sensor in the tail pipe you won't know what the car is doing, I would take it to a Buick Turbo shop and have them set your chip up for you. Looks like your not to far from Jack Cotton of Cotton's Performance.
I know around my parts Billy Anderson is close to Baltimore MD, he has the dyno and knows how to set-up a good tune.
I'm running Eric's Turbo Tweak Speed Density chip and have the wide band O2 sensor in my car permanently hooked up. I don't have any soot inside my tailpipes, my guess is your car is set-up to rich.
As far as the cat being gutted or running no cat converter, I honestly don't know anyone that is running a cat in there Turbo Buick.

Chuck

 

[williamsGN]

I actually put down floormats on the garage floor to catch the soot as it flys out on start up... no problems here...no cat either. Can't lean out the mixture anymore with the TT chip or it'll run too lean. My scanmaster numbers are all in spec.


So it's the same answer from last time you asked

http://www.turbobuick.com/forums/ge...398-gn-seems-very-rich-idle-soot-exhaust.html

 

[PaulRV6]

Correct, I did ask this before only because it still bothers me. Would Eric be able to modify my existing chip to lean it out at idle? Thanks

 

[bsdlinux]

I had a similar issue with my White Car however I was getting over 22 MPG on the highway and I had a Cat converter and a TT street chip. Seemed to run great but plenty of black soot on startup. I just think the gas is crap now days. Of course after switching to E-85 the black soot is all but a memory now :biggrin:

 

[williamsGN]

I think it's a build up from use, not just at idle... otherwise mine wouldn't blow out as soon as I start the car when it's cold.