Jake Posted October 11, 2004 Share Posted October 11, 2004 After running at Santa Pod yesterday I noticed that the inside of my exhaust tailpipe is coated in light grey soot. It's usually black like coal soot. I thought it was maybe because I was using 113 octane Klotz race fuel at Pod but I've gone through a whole tank of regular SUL since then and it's still a light grey colour. Isn't this a sign of severe under-fuelling? I've driven about 300 miles since Santa Pod and the car hasn't gone bang yet. What should I check? Thanks Quote Link to comment Share on other sites More sharing options...
Jake Posted October 11, 2004 Author Share Posted October 11, 2004 Oh, it's a '93 RZ Auto. 1x Walbro pump. Full decat and running around 1.25 bar. Otherwise stock. Quote Link to comment Share on other sites More sharing options...
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