We have a 1999 Montana and today we had a problem starting it. First it was 90 degrees here today. Started up no problem this afternoon and was driven 1 mile to a gas station and had 20 dollars regular put in, restarted fine and was driven just 1/4 mile to the gym and was left sit for 1 1/2 hour. The engine cranked strong but would not start. We left it there and came back about 4 hours later and it started right up no problem. This is the first time we have had this problem. I am afraid this may happen again, Thanks for your help.