Guys, I have had black smog emitted out of my exhaust in kick down push moment, emission is not continued even you keeping hold acceleration pedal in the floor, just short emission.
That tells about rich Air fuel ratio, and that is definitely opposite of my opinion, because it started after I installed 178mm crank pulley this no tune which means I increase air boost and no fuel map ratio, I thought I would run with poor AFR not rich. The same issue with my friend’s C32 after installing 178mm pulley.
P.S I twice had 1 miter of fire when I test my car for max speed so I drove hard and at the end of 4th gear my friend running behind noticed that fire till I went to 5th gear, he was scared of thinking I might blow up.
I did not feel any power loss or something else.
Does anyone has an idea what the hell is that?

 

Does any body answer me?

 

If you are getting flames out the tail pipe you need fuel .
That would indicate it is not a complete burn in the cylinders.
Most likely a rich condition, I believe when they tune these cars, they also advance the spark.
That is all I can tell you.

 

That was before ECU tune and after LET tune, i got my sparks that is the same age as my car so 8 years old, may be problem with them.

 

Yep....runnin rich dude ! Is it missing at idle ?