Idle speed issue on CNG

[imrances]

Sir I have Carby cultus. On petrol no any problem stay at 1000 rpm at idle but when i shift to CNG its idle rpm goes to zero. Lot of setting done by Mechenic but in vain except one how done some sprig setting in cng kit but not longer. Secondly is any change rpm when switch between CNG and petrol. I have company fitted CNG. This problem improve when engin is heatup. Any Helps THANKs

[hash4u]

check for air leaks if any
else u will have to block air inlet a bit more

[imrances]

Sir i phesicaly check around air filter no any air leakage seen. But question is why i face this problem only on CNG. Thanks

[hash4u]

these are are not meant or designed to run on cng
we alter them
usually bad iddling is due to much air
air mixture setting on kit gone bad
or timing now advance enough

[imrances]

Thanks for your response. Firstly its company fitted CNG no alteration secondly one mechanic add some cone in air filter inlet hose pipe to reduce air pressure. You are right it is a possibility but when engin heat up CNG working fine on idling. Thanks dear.