Originally Posted by GDC-SRT
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.