Problem at high speed.plz help

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Problem at high speed.plz help

Salam,
I have Mehran VX 2003.
Car starts taking jerks at high speed like 95km/h, only on CNG.
I got changed following parts to solve this issue but problem persists.
Plug, plug wire, air filter,Coil, Point, etc
Upto 90Km/h, car runs very smoothly and perfectly with good pick and mileage,
but porblem start above 90Km. It seems as car is out of current or gas. but by reducing the speed problem vanished.
What should i do to solve my issue
I have to quite overtaking due to this stupid problem

Gari.pk User 9654 asked on 07 Oct 2010 11:47:33 am

1 Answer