Yes, this cng powered Scania Omnilink bus from Nobina had a really hard time getting started, this happens alot here in Sweden, guess the gas used or the engines are of very poor quality since they very often struggles to start or fails to start althogether, another problems is rattly engines, as shown in my last video, frequent breakdowns in the middle of the road, which leaves passengers stranded, misfiring, engine rebuilds or replacement every 100 000 kms ( 60 000 miles ) Still the world think that this is future, but they never see the reality. i know of several bus drivers that quit driving buses because of these cng buses.