hey, i own a vs 5ltr ute on duel fuel...... and when on gas and u mat the throttle when it gets to bout 4000rpm, it vibrates alot and doesnt seem to rev correctly and lose power and when i flip it ova to petrol it seems to do it at bout 4800rpm but not as bad as gas, i had it on the dyno it was getting the right timing etc, i was told it might be choking due too the, gas induction pieace in the air boot......... so i took it out and ran it on petrol and it still did it

its driving me nuts, its got new leads an spark plugs when i got it 3 months ago, new fuel filter............... could it be the torque converter?? unbalanced?? so any suggestions would be awsome

also when it was on the dyno, it produced 109RWKW with a CAI an Extractors and sport exhaust, its that below the average or ok????? they said taking the gas peace out it would get bout 20 more KW but i dunno???

i just want it fixed!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!