29th Jan 07 Hi, many thanks for your help on Saturday with the install of my tuning box. i am very pleased with its performance-the Cherokee had difficulty pulling away due to a large flat spot and lacked any power before 2500rpm. following the install i noticed a immediate improvement-the car pulled away with a lot less throttle than before,the flat spot was gone and the car was much easier to drive. i adjusted the box until i felt it gave the best combination of low down power and smooth delivery-i never got any excess smoke or management lights,in fact i think when driven flat out there is less smoke than before! This is a excellent upgrade and i would recommend this to anybody who feels there diesel lacks power. many thanks Tony Lindars