hi
i have problem in my car , i serch too much i didnt find any ensor for this problem , i buy the UTEC and uesd it for 15 Miles the car have vibrating 1000RPM to 3000 RPM i run map 1 i turn off the car in the highway and back uesd stock map , after 1 day i buy NGK spark pulg Iridium One Step Colder i open the plugs i see black spark in the first left and right pistons , and all the pulg are normal white color , i uesd the new spark i have same proplem (stock map) , any one have same ?

 

no one have ansor??