Engine vibrates alot when AC is on

[sajidali545]

Assalam o Alaikum to all members.

I have a suzuki mehran 2008 VX, i recently bought in last september.

Kch weeks pehle mene iska AC working mein krvaya hai. Mechanic ne ac ki service ki thi aur gas dali thi and then adjusted the cng fuel supply on AC.

Now ever since i got my AC in working condition, i have some issues:

1- the pickup on CNG while AC is on has dropped drastically. Jb gari cng pe ho aur AC on ho to car ki acceleration bht slow hojati hai. while on petrol, its relatively better. Without ac the pickup is normal

2- cng pe AC chalao to engine mein vibration b bht aati hy aur jb gari signal wghera pe ruki hui ho to aisa lgta k gari jhatka de k abhi bnd hjaegi..

Guys any help about these issues and how to resolve them?

Thanks in advance

[omar4494]

May I request plz either use full roman urdu or English. It seems you can also write in english, this helps to get good and fast response. Thanks. Hope you don't mind.

[sajidali545]

Ok will try to implement your suggestion from next fine on.

Now can i get some feedback in my issues?

[sajidali545]

Ok I will try to implement your suggestion nxt time.

Now can i have some feedback on my issues?

[MGK]

You need to see some good CNG mechanic who will do tune-up of your car engine with AC on CNG by adjusting different fuel mixtures and cleaning plug, point, may be carburetor, and change air filter, this will help you.

[jwadpoet]

You need to live with it . tune ups and mechanic visits won't make big difference.

[sajidali545]

Will increasing the idle rpm on cng make a bit of difference in solving this issue?

[sajidali545]

@mgk, can you suggest a good cng mechanic in karachi?

[abid110]

@mgk, can you suggest a good cng mechanic in karachi?

I have 2008 vxr too. Ac is awesome Mashallah but its true that car dies a bit on cng when ac is on. It is normal since its a 800cc non efi car. In efi, the ecu can adjust the fuel supply accordingly but not in other case. So its normal. Dont think too much. You will spend alot of money without gaining any performance improvement.