Scott370z Posted November 3, 2019 Share Posted November 3, 2019 I recently upgraded to an n1 invidia exhaust system fitted with HFC'S. Has anyone else had problems with emissions? It has been fitted with extended 02 sensor tubes aswell and still seems to be a problem. Obd2 cancelled out the engine check light and still problems. Could it be that it's running too rich a fuel mixture my exhaust colour is quite black ? It was also blasted couple of times to get cats piping hot too. Also would a remap be beneficial? Your advice would be greatly appreciated many thanks in advance. Quote Link to comment Share on other sites More sharing options...
Andy_Muxlow Posted November 3, 2019 Share Posted November 3, 2019 I have hiflow cats and an invidia gemini exhaust. I have never had this problem Scott. It seems odd. If anything it will be the cats at a guess. Quote Link to comment Share on other sites More sharing options...
Umster Posted November 3, 2019 Share Posted November 3, 2019 Who fitted the exhaust? Been checked for leaks and build/assembly quality? Quote Link to comment Share on other sites More sharing options...
Andy_Muxlow Posted November 3, 2019 Share Posted November 3, 2019 7 hours ago, Umster said: Who fitted the exhaust? Been checked for leaks and build/assembly quality? It was Bob at tarmacsportz I believe. Quote Link to comment Share on other sites More sharing options...
Umster Posted November 3, 2019 Share Posted November 3, 2019 1 hour ago, Andy_Muxlow said: It was Bob at tarmacsportz I believe. Guess a remap looks the way forward, bit of time of the dyno will unlock a few nuggets of info about the engine etc. If its been professionally fitted then exhaust most likely isn't the issue. Quote Link to comment Share on other sites More sharing options...
Scott370z Posted November 4, 2019 Author Share Posted November 4, 2019 Bob did a very good job of fitting it so I'm guessing it hopefully is a tuning issue it does look like very black inside the rear pipes and could be running too rich we will see will keep you posted it's going in for checks in two weeks . Quote Link to comment Share on other sites More sharing options...
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