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Discussion Starter · #1 ·
What does it normally mean when there is a lot of carbon residue buildup on the exhaust tip? Running rich?
 

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Or lots of short trips with the engine cold

Or a fuel pressure regualtor fault

Or an upgraded fuel pressure regulator has been fitted...........I get it a lot! ;)
 

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Discussion Starter · #4 ·
Chris 9-5 said:
Or lots of short trips with the engine cold
I think this may be me. I don't know whether the amount of carbon deposits is more than normal though. I see lots of other cars with worse looking tips than mine.
 
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