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ZUKIWORLD Discussion Forum => Technical Discussion - Performance / Modify => Topic started by: Solitude on November 17, 2012, 06:52:00 AM

Title: Exhaust spewing black soot?
Post by: Solitude on November 17, 2012, 06:52:00 AM

I started my 88 Samurai yesterday to show it to someone, and it began spewing a black sooty substance from the tailpipe.  Does anyone know what causes this?

Title: Re: Exhaust spewing black soot?
Post by: ecoast on November 17, 2012, 07:20:48 AM

un-burnt fuel with moisture from condensation.

Title: Re: Exhaust spewing black soot?
Post by: KJMac on November 17, 2012, 09:49:07 AM

Yes, excessively rich condition. Could be over choking or needs a tune up. If your ignition parts are old then you might want to inspect or replace and check the choke adjustment.