well i have a toyota corolla 2010, now the problem is that it runs fine on petrol absolutely,,, but it annoy so much in the starting 5-10mins while on cng , until the needle reaches half of the (that engine hot cold meter) .. and if i get the engine warmed on petrol, and then switch to cng, it would continue getting closed foh 5-6mins, until i have restarted it again and again 6-7 times,, i should it to one cng wala , he said the tuning is fine, and it is cuz after the 5-7 mins of the start or um 10mins ,, it get awl ok.... help =l ? !