Assalam u alaikum, i have cultus efi with factory fitted CNG, i have replaced the stepper motor with manual T, but the pick of the car is not good, car accelerates fine upto 2.5k rpm but after crossing 2.5k rpm car suddenly becomes heavy, i showed it to different mechanics and they suggested to install simple CNG control and wiring without advancer, now i know how to install advancer with simple cng switch and wiring and recently did it in my cousins Cultus 2013 model (without FF CnG) which BTW works fine but in my case there is already stap 50b (advancer or retarder I don't know) installed under glove box, so i want to know how to disconnect that so i can install a new advancer, any help would be really appreciated. Note: timing is set to 8 degrees with timing gun on petrol and car runs great on petrol.