Mixing CNG and Patrol

[umairaslam22]

I have a problem in my Mehran 2003 , factory fitted CNG kit , When I am driving it via CNG after 10 - 15 KM suddenly some small patrol droplets came in carbuerator and car starts jerking alot or slow down when I change switch position from CNG to neutral car becomes normal and travel few meters at nuetral then when fuel (might be patrol in carbuerator) ends up it slow down and I turn ON CNG it again runs smoothly

Notes : It runs smoothly with good mileage on patrol

I spent alot of money with 2 mechanics and they are unable to rectify this fault changed switch and solenoid patrol switch.
Once they unplugged patrol pipe. then car is jerking again (might be due to air mixing but not sure)

Any one can help or give me contact of any expert professional CNG mechanic

[mkashifidrees1]

Car ka ptrol ka pipe jabn se akr carborator ko lgta hy whan per black color ki aik device lge hy body k sat whan se ptrol cntrol hta hy wo khrb he, usy badl do ya us k oper aik choti se nobe lgi hy ush bnd kr do teek ho jay ga

[pwuser154394594980]

Having same problem. If u got the solution put a help to leave it.

[umairaslam22]

Assalam o alekum , yar mere pass issue ye tha k extra petrol carburetor se return nahi ja raha tha , air lock honay ki waja se return walay pipe se bhi patrol wapis engine ki taraf aa raha in CNG mode. Mechanic ne sab kuch change karwa diya tha converter , cng switch , carburetor service. Akhir main ek mechanic ne petrol tank ka cover hata k air lock khatam kiya. To ye masla hal ho gaya tha.