What causes black somke when letting off gas?
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From: Shakopee, Mn
Car: 89 Iroc
Engine: 305TPI
Transmission: T5
What causes black somke when letting off gas?
I just got back from the track and my friend told me that I had a black puff of smoke coming from the tail pipes when I would shift. I read before what causes it but I forgot. Is it because I am running rich or what. Thanks for the help.
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Joined: Feb 2000
Posts: 1,416
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From: Johnstown, Ohio
Car: 84 Z28
Engine: 355 (fastburn heads, LT4 HOT cam)
Transmission: 700R4
Axle/Gears: 9-bolt, 3.27
The one word answer: FUEL
It sounds like you may be running a bit rich. Black smoke is excessive fuel, white smoke is water, and blue smoke is oil.
------------------
Working on:
'84 Z28 LG4 305 with 200,000 original miles!
Added dual elec fans.
145 MPH IROC Speedo
Building 430 HP 350 (ZZ430)
using primarily GMPP parts.
Short block sitting on a stand. (Man, those Fast-Burn heads sitting on it look good!)
Starting to look like the Kicker poster child!
ASE Certified Master Tech
It sounds like you may be running a bit rich. Black smoke is excessive fuel, white smoke is water, and blue smoke is oil.
------------------
Working on:
'84 Z28 LG4 305 with 200,000 original miles!
Added dual elec fans.
145 MPH IROC Speedo
Building 430 HP 350 (ZZ430)
using primarily GMPP parts.
Short block sitting on a stand. (Man, those Fast-Burn heads sitting on it look good!)
Starting to look like the Kicker poster child!
ASE Certified Master Tech
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