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GTO Lover
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532 Posts
Discussion Starter · #1 ·
Recently my car has seemed to have a bit more carbon shooting out of the back at startup. I let it sit for a little while on startup the other day and after about 5 minutes there was a nice black spot on my driveway. Am I running rich or could it be something else? It seems weird this would just seem to get worse without me modding or doing anything different. Help me out here plz.

Edit. The only mod done since my last tune was my exhaust.
 

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burnout silver star award :)
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2,166 Posts
what kind of exhaust? do you have cats?
 

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GTO Lover
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532 Posts
Discussion Starter · #3 ·
Flowmaster, Yes High Flow Cats
 

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burnout silver star award :)
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assuming you put atleast 91 octane in it and it hasnt sat for awhile it could be the change in seasons. buildup gets saturated with moisture and when you start it its all blown out the back.
 

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In it til' the end
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325 Posts
FI05Goat said:
Try running some SeaFoam through it
+1

I'm pretty sure SeaFoam could cure cancer if we tried it
 
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