In my 98 model 306 griffe vehicle, I have a problem of cycle fluctuation and stopping when the vehicle is idle, both in petrol and lpg. Even if it does not stop, while the cycle fluctuates, it eats late gas at the first gas feeding and stops if I release the clutch immediately. There is no problem with gas and going after the vehicle gets up. Lpg injector and filter changed. The spark plugs have changed. The throttle was cleaned. The vehicle has a tubular open air filter. As the last master air filter is not original, he draws a lot of air and ripples at idle, he said. Do you think it can be from the open air filter? Are there any problems with idle filter for friends who use open air filters? What should I do if there are friends who have experience on the subject?