minimotors might be right becoz it happened with me and MAYBE MAYBE its becoz of the ECU which got fk up... It causes problem with the CNG thingy, rpm drops and garee band... But ive its been fixed by suzuki guys now.. probably they installed a new ECU unit... but anyway, its working fine now, so as the trakker..
id suggest have a tracker, but be there when they are installing it so they do it properly and dont mess anything, or syou can check if everything is in working condition or not...