@suzuki ,,,,,, thanks buddy ur reply apreciated .....i just came back from the cng walla he said that the advancer is dead he gave me a drive after disconnecting it ...and said see for ur self theres no change and then said the car first needs to be set on petrol than hell set it on cng after the nw advancer is installed .......he suggested hkz1 (1 year warranty) worth 4500 or 4000 i guess first he said that advancer emulator both need to be changed worth 9000( hkz1) then the mechanic said only advancer changing would be fine worth 4-4.5k........ ill really apreciate if you would tell me the ideal advancer for it ............thanks again