Abby Wambach Won't Say If Booze Fueled 2014 Wreck

She's admitted to years of alcohol and Rx drug abuse -- but Abby Wambach is staying mum when it comes to the mysterious 2014 car wreck in which she flipped an SUV and fled the scene.

We broke the story ... Wambach flipped her Range Rover just after midnight on June 28th, 2014. The car landed on a residential property -- causing damage to the front lawn.

Moments after the crash, a passerby who came upon the flipped car called 911 and said the driver had already left the scene. Abby told cops she walked home because she didn't have her cell phone and wanted to call a tow truck.

Unclear why she didn't flag down a motorist or knock on the door of the home where she flipped.

Despite the severity of the crash and the curious fact she left the scene -- cops say they had no reason to believe Abby was impaired and did not administer a DUI test of any kind.

But now with Abby admitting her life was out of control with booze and prescription drugs -- we had to ask her straight up ... were you intoxicated on the night of the crash?