2018 Zforce 500 wont start. It came back off the mountain having trouble pulling up hills and starting..seemed to be a fuel problem. There were and still aren't any makfunction lights or codes. cleaned air filter changed fuel filter, the fuel , the injector, the spark plug , checked all the fuses. fuel is making it out of the new injector (old was clogged) the spark plug is gapped properly and sparking. still wont start.