The 1990 AC Spark Plug 500 was the 16th stock car race of the 1990 NASCAR Winston Cup Series season and the 18th iteration of the event.

The race was held on Sunday, July 22, 1990, before an audience of 90,000 in Long Pond, Pennsylvania, at Pocono Raceway, a 2.5 miles (4.0 km) triangular permanent course.

Depending on fuel mileage, Junior Johnson & Associates driver Geoff Bodine would manage to coast his car for the final 43 laps of the race to take his ninth career NASCAR Winston Cup Series victory and his second victory of the season.

The race was held at Pocono International Raceway, which is a three-turn superspeedway located in Long Pond, Pennsylvania.

Mark Martin, driving for Roush Racing, would win the pole, setting a time of 56.867 and an average speed of 158.264 miles per hour (254.701 km/h) in the first round.