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My Nissan Sylphy with a 2L Neo Direction Injection engine was running rich due to 2 faulty injectors (leaking) and I replaced all 4 injectors three months ago.

I have put 2000Km during this three months time now.

When I was running rich, my tail pipe was rich black; even after cleaning and riding 50Km in the city, it turned in to black again.

So, I knew that the black color is due to the rich condition and now, what do you guys think about my tailpipe tip now? I'm assuming that this is the perfect color anyone should have?

What is good tailpipe tip color

PS: I did a search before post this and found some forum discussions too. Some says that the brown color is okay and some says different stuffs. So, I wanted to clarify.

I'm thinking that the brown color is due to my rusted tailpipe and I have grey color above that.

  • Have you researched this anywhere? – Solar Mike Dec 25 '17 at 13:30
  • @SolarMike Yes I did. I found some forum discussions too. Some says that the brown color is okay and some says different stuffs. So, I wanted to clarify. Thanks! – madhushankarox Dec 25 '17 at 13:33
  • Then add that to your original question - then people can give informed answers. – Solar Mike Dec 25 '17 at 13:34
  • @SolarMike already :) – madhushankarox Dec 25 '17 at 13:35
  • The sources to those? Either as they may be helpful or to be avoided... – Solar Mike Dec 25 '17 at 13:36
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A good colour is a light grey - I spent a lot of time tuning the jets on the carbs on my v8 to get the mixture just right...

  • Yes. I have heard/read about that. The right color should be grey :) But, I'm thinking that the brown color is due to my rusted tailpipe and I have grey color above that. Is that right? What do you think about this color? – madhushankarox Dec 25 '17 at 13:52

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