NASCAR rules require the steel cover to be mounted securely with bolts, not quick-release fasteners. In February at Daytona, NASCAR penalized five Nationwide Series teams for oil tank covers that were not fastened securely.
"If we were trying to cheat, we would have come up with something a lot better than that," Edwards said Tuesday after wrapping up a test session at Phoenix International Raceway.
NASCAR spokesperson Kerry Tharp said the sanctioning body would make no announcement Tuesday concerning Edwards' car, because the Roush Fenway Ford was still in transit from Las Vegas to NASCAR's research and development center in Concord, N.C., where it will be subjected to further evaluation. It is NASCAR's custom to take the winning car from each race to the R&D center.
"Everybody is just doing the best they can," Edwards said. "I'm going back to the shop to prepare for this weekend -- and then on to Atlanta."
Pending any penalties that may be imposed for the violation, Edwards enters Sunday's Kobalt Tools 500 at Atlanta Motor Speedway leading the Sprint Cup standings by 21 points over Kyle Busch.