I have a 95 chevy blazer. Last week I put some gas in it and as soon as I got on the interstate it starting acting like it was going to cut off as if it was running out of gas. It cut off as soon as I got off the interstate and did not start for an hour. When I got home it did not start for a week. It would act like it was going to turn over but didn't. I had someone look at it, they used started fluid and it started. It ran all day but still acted as if it was going to shut off and now it won't start. They said I have some bad gas. What should I do.