Hey guys what do i do if i think my cars runnin to rich, everytime im WOT and shift the car backfires *KERPOW* and i smell like ive been mowin the lawn everytime i get outta my car just wreak like gas n exhaust... Any help appreciated.

 

You might want to enumerate a few details (like what car and modifications do you have), that'll make it easier for others to chime in.