Do you have a braking problem, or is the car only misfiring in third and fourth? If it is a braking problem, is it related to the random misfire or are these two different problems?
List of mods that you have done would help, mostly stock is vague.
__________________
1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
|