I have a 98 Malibu with 94,000 miles. About once a week the car will lose power. Maximum speed will be somewhere between 20 and 30 mph. This seems to happen most often when I take my foot off the gas and coast for a bit before stepping on the gas again to go up a hill. The dealer just says there are no codes set and they can't reproduce the problem.

Any thoughts on this? Does anyone else have this problem?

Thanks.....