Some teams were using alternatives to nitrogen which the guns were designed for
For 2018, NASCAR mandated air guns on pit road. They pass out the tanks and hoses the morning of the race. An hour before the race, a number is drawn for a pit gun.
All the guns are suppose to be the same. Though, several teams have been having more issues than others. Specifically, Joe Gibbs Racing and Stewart-Haas Racing. In most of those cases it’s been inconsistency in the guns, not tightening the lug nuts.
Recently, NASCAR has a team owners meeting. In that meeting, it was expected that pit guns would be the topic.
“When you got something like this going on and it’s happening to multiple teams, each week. I think you gotta find a way to fix it. I think that’s what we’ll be talking about this week,” Joe Gibbs said following the win at Bristol with Kyle Busch.