Fuel filter would be our first thought, then fuel pump (had a failing one of those from being brand new!). Once our fuel pump was replaced we had no further problems after 18 months from brand new of limping everywhere overnight in the cool evenings, then resting for several hours somewhere during the day. Were told we had a dirty fuel filter on our first trip and they wanted us to pay for it until they finally acknowledged at manufacturer that we hadn't had it long enough to personally cause that and were using good quality fuel by the receipts, took almost 18 months to get resolved when we insisted they check the fuel pump = voila never a problem since and that was 13+ years ago.